50 bài tập Modal verb có đáp án

Bài tập Modal verb có đáp án

I. Lý thuyết cách làm Modal verb

1. Động từ khuyết thiếu – Modal verbs là gì?

Động từ khuyết thiếu (Modal Verbs) là loại động từ có chức năng bổ trợ nghĩa cho động từ chính, không được sử dụng là động từ chính trong câu. Nó dùng để diễn đạt khả năng, sự dự định, sự cấm đoán hay cả sự cần thiết… Động từ khuyết thiếu đứng trước động từ chính ở dạng nguyên thể để bổ sung nghĩa cho động từ chính.

Một số động từ khuyết thiếu phổ biến như: have to, must, can, could, may, might, should, ought to,…

Cấu trúc:

(+) S + Modal verb (must/can/could/may/might/should,…) + V (nguyên thể) + O

(-) S + Modal verb (must/can/could/may/might/should,…) + not + V (nguyên thể) + O

(?) Modal verb (must/can/could/may/might/should,…) + S + V (nguyên thể) + O?

Ví dụ:

- Linda can play volleyball very well. (Linda có thể chơi bóng chuyền rất giỏi.)

- You should finish your homework before going to the theatre. (Bạn nên hoàn thành bài tập về nhà của mình trước khi đi xem phim.)

- Can you please get out of here? (Bạn làm ơn có thể ra khỏi đây không?)

- She has a fever. Tomorrow she would not go to school (Cô ấy đã bị sốt, ngày mai chắc cô ấy sẽ không đi học được)

2. Đặc điểm của động từ khuyết thiếu

Do không mang đầy đủ chức năng và tính chất của động từ thường, khi sử dụng các động từ khuyết thiếu chúng ta cần lưu ý những điểm sau đây.

Không phải chia theo các ngôi số ít hay số nhiều

Các động từ khuyết thiếu không phải chia theo các ngôi số ít hay số nhiều, chỉ sử dụng ở hai thời điểm đó là hiện tại và quá khứ.

Dạng của hiện tại: may, should, can, will, ought to, had better

Dạng của quá khứ: might, should, could, would, ought to, had better

Ví dụ:

- My brother can speak French fluently. (Anh trai của tôi có thể nói tiếng Pháp thành thạo.)

- We could go out if it didn’t rain. (Chúng tôi đã có thể ra ngoài đi chơi nếu mà trời không mưa.)

Không có dạng nguyên mẫu, không có “to” hay các dạng phân từ khác.

Thay vì được sử dụng cho tất cả các thì như động từ thường, động từ khuyết thiếu không có dạng nguyên mẫu, không có “to” hay bất kỳ dạng phân từ nào khác.

Ví dụ:

- Linda can dance very beautifully. (Linda có thể nhảy rất đẹp.)

- Bill will go to Cat Ba tomorrow. (Bill sẽ đi Cát Bà vào ngày mai.)

Không cần trợ động từ đi kèm trong câu hỏi Yes/No hoặc câu hỏi có vấn từ.

Ví dụ:

A: Can you swim? (Bạn có thể bơi không?)

B: Yes, I can (Tôi có thể.)

Có cách dùng tương đối như một trợ động từ trong câu.

Động từ khuyết thiếu đứng trước động từ chính và bổ nghĩa cho động từ đó, vì vậy chúng mang cách dùng tương tự như một trợ động từ.

Ví dụ:

- I will go to Sam Son beach next Sunday. (Tôi sẽ đi tới biển Sầm Sơn vào chủ nhật tới đây.)

- I won’t go to Sam Son beach next Sunday. (Tôi sẽ không đi tới biển Sầm Sơn vào chủ nhật tới đây.)

3. Các động từ khuyết thiếu thường gặp

Mỗi động từ khuyết thiếu sẽ có một ý nghĩa và chức năng riêng biệt. Vì vậy chúng ta phải nắm rõ cách dùng của từng từ để có thể vận dụng linh hoạt trong ielts tiếng Anh cũng như tránh những nhầm lẫn không đáng có. Hãy cùng Step Up tổng hợp lại một số động từ khuyết thiếu thường gặp nhất qua bảng ngay sau nhé.

Động từ khuyết thiếu	Chức năng	Ví dụ	Chú ý
Can: có thể	Diễn tả khả năng tại hiện tại hoặc tương lai về ai đó có thể làm được những gì hoặc một sự việc có thể sắp xảy ra.	This class can start in September Linda can sing and dance very well	Can và Could trong ielts tiếng Anh còn được sử dụng trong các câu hỏi, câu đề nghị, xin phép và yêu cầu. Ví dụ: Could you repeat your name, please?
Could: có thể (dạng quá khứ của “can”)	Diễn đạt một khả năng xảy ra trong thì quá khứ	My daughter could read books when she was only four years old.
Have to: phải	Diễn tả sự cần thiết phải làm điều gì nhưng là do tác động bởi yếu tố khách quan (nội quy, quy định…)	“You have to stop smoking.” Her doctor said.	Don’t have to = Don’t need to (không cần thiết phải làm gì)
Must: phải, chắc hẳn	Diễn đạt sự cần thiết, điều bắt buộc ở thì hiện tại hoặc trong tương lai Đưa ra lời khuyên hay sự suy luận mang tính chắc chắn, yêu cầu được nhấn mạnh	All students must hand in their assignments before 18th August. It’s raining. It must be cold.	Mustn’t – chỉ sự một cấm đoán Ví dụ: You mustn’t smoke here!
May: có thể	Diễn tả điều gì có thể xảy ra ở hiện tại	It may rain today	May và might còn có thể dùng để xin phép. Nhưng might ít sử dụng trong văn nói, chủ yếu sử dụng trong câu gián tiếp: Ví dụ: May I close the door?.
Might: có thể (dạng quá khứ của “may”)	Diễn tả điều gì có thể xảy ra ở quá khứ (cũng có thể dùng cho hiện tại nhưng ít khả năng hơn “may”)	Who has just called Lam might be June.
Will: sẽ	Diễn đạt về sự dự đoán sự việc xảy sẽ ra trong tương lai. Đưa ra một quyết định ngay tại thời điểm nói.	Tomorrow will be rainy. Did you buy a pen for me ? Oh, sorry. I’ll go now.	Will và Would còn được dùng trong câu đề nghị, yêu cầu và lời mời Ví dụ: Will you take a photo? Would you like a cup of tea?
Would: sẽ (quá khứ của “will”)	diễn tả một giả định xảy ra hoặc một dự đoán về sự việc có thể xảy ra trong quá khứ	I would go picnicking if it didn’t rain.
Shall: sẽ	Thường dùng để xin ý kiến và lời khuyên. (Hiện nay “will” được sử dụng nhiều hơn so với “shall”)	Where shall we eat tomorrow evening?
Should: nên	Diễn đạt sự bắt buộc hay nhiệm vụ bắt buộc nhưng ở mức độ nhẹ hơn so với “must” Dùng để đưa ra lời khuyên và ý kiến Dùng để đưa ra suy đoán	You should send this contract to John before 5 p.m. You should go to bed before 11 p.m everyday. He studied very hard, he should get better grades.
Ought to: nên	Chỉ sự bắt buộc, có tính chất mạnh hơn “Should” nhưng bé hơn “Must”	You ought not to eat ice cream at night.

II. Bài tập Modal verb

Exercise 1. Choose the best option for each sentence:

1) Young people ______ obey their parents.

a. must

b. may

c. will

d. ought to

2) Laura, you and the kids just have dinner without waiting for me. I ______ work very hard today.

a. can

b. may

c. should

d. would

3) I ______ be delighted to show you round the factory.

a. ought to

b. would

c. might

d. can

4) Leave early so that you ______ miss the bus.

a. didn’t

b. won’t

c. shouldn’t

d. mustn’t

5) Jenny's engagement ring is enormous! It ______ have cost a fortune

a. must

b. might

c. will

d. should

6) You ______ to write them today.

a. should

b. must

c. had

d. ought

7) I hope I ______ find it.

a. will

b. shall

c. could

d. must

8) Unless he runs he______ catch the train.

a. will

b. mustn’t

c. wouldn’t

d. won’t

9) ______ you be in Rome tonight.

a. will

b. may

c. might

d. maybe

10) We ______ have time to help you tomorrow.

a. may

b. must

c. will

d. could.

11) "______ you hand me that pair of scissors, please?"

a. May

b. Will

c. Shall

d. Should

12) Jeanette did very badly on the exam. She _____ harder.

a. must have studied

b. should have studied

c. could have studied

d. must studied

13) He was very lucky when he fell off the ladder. He _____ himself.

a. could have hurt

b. should have hurt

c. must have hurt

d. will have hurt

14) Marcela didn't come to class yesterday. She _____ an accident.

a. should have had

b. might have

c. must have

d. may have had

15) John still hasn't come out. He ______ everything for the trip now.

a. must have been preparing

b. will be preparing

c. must be preparing

d. will have prepared

16) Thomas received a warning for speeding. He _____ so fast.

a. shouldn't have driven

b. would have driven

c. should have

d. might have driven

17) The photos are black. The X-ray at the airport _____ them.

a. should have damaged

b. would have damaged

c. would damage

d. must have damaged

18) Tom didn't do his homework, so the teacher became very angry. He _____ his homework.

a. must have done

b. should have done

c. might have

d. will have done

19) My car stopped on the high way. It _____ out of gas

a. may run

b. may have run

c. must be

d. should have run

20) Robert arrived without his book. He _____ it.

a. could have lost

b. should have lost

c. would have lost

d. will have lost

21) "Where do you think Rooney is today?". "I have no idea. He _____ late."

a. should have left

b. would have sleep

c. would sleep

d. may have sleep

22) Berbatov painted his bedroom black. It looks dark and dreary. He _____ a different color.

a. had to choose

b. should have chosen

c. must have chosen

d. could have been choosing

23) The children _____ "thank you" to you when you gave them their gifts.

a. will have said

b. must say

c. should have said

d. should say

24) If we had known your new address, we _____ to see you.

a. came

b. would have come

c. will come

d. would come

25) These two boys look identical. They _____ twins.

a. must have been

b. must be

c. should be

d. should have been

Đáp án:

1 - a	2 - c	3 - b	4 - b	5 - a
6 - c	7 - b	8 - c	9 - a	10 - c
11 - a	12 - b	13 - a	14 - d	15 - c
16 - a	17 - d	18 - b	19 - b	20 - a
21 - d	22 - b	23 - c	24 - b	25 - a

Exercise 2. Rewrite the sentence in the same meaning:

26) Perhaps Susan know the address. (may)

Susan ........................................................................................................

27) It's possible that Joanna didn't receive my message. (might)

Joanna ......................................................................................................

28) The report must be on my desk tomorrow. (has)

The report .................................................................................................

29) I managed to finish all my work. (able)

I ................................................................................................................

30) It was not necessary for Nancy to clean the flat. (didn't)

Nancy ......................................................................................................

31) The best thing for you to do is to sit down sit down. (better)

You ..........................................................................................................

Đáp án:

26. Susan may know the address

27. Joanna mightn't have received my message

28. The report has to be on my desk tomorrow

29. I was able to finish all my work

30. Nancy didn't need to clean the flat

31. You had better sit down

Exercise 3. Rewrite the sentence in the same meaning:

32. I think you should give up smoking immediately. (had)

I think you ……………………………………………………

33. I am sure you were surprised when you heard all the news (must)

You ………………………………………………………………….. when you heard the news

34. It’s very inconvenient if you can’t drive. (able)

…………………………………………………………………

35. Someone almost certainly broke the window on purpose. (must)

The window ………………………………………………….. on purpose

36. I am sure that the cat is in the house somewhere. (must)

……………………………………………………………………

37. It is possible that one of the men died on the mountain. (may)One of the men

……………………………………………………on the mountain.

38. It’s necessary for me to bring my passport. (have)

I ……………………………………………………………………

39. It wasn’t necessary for you to do all this work (needn’t)

You ………………………………………………….. all this work

40. I am sure that John is not the thief. (can’t)

…………………………………………………………………..

Đáp án:

32. I think you had better give up smoking immediately.

33. You must have been surprised when you heard the news.

34. It is very inconvenient if you aren’t able to drive.

35. The window must have been broken on purpose.

36. I am sure that the cat must be in the house somewhere.

37. One of the men may have died on the mountain.

38. I have to bring my passport.

39. You needn’t have done all this work.

40. I am sure that John can’t be the thief.

Exercise 4. Hoàn thành những câu dưới đây theo các động từ: might, might not, must, mustn’t, can, can’t.

1. Don’t stand up in the boat! You …………………. fall in the river!

2. You really …………………. start spending more time on your work.

3. That’s a really stupid idea! You …………………. be serious, surely!

4. Don’t be silly. You …………………. expect me to believe you!

5. I learn to fly! You …………………. be joking!

6. Sue says she’s stuck in traffic and she …………………. be late.

7. Tell Peter he. …………………. stay the night here if he wants to.

8. You …………………. realize it, but this is very important to me.

9. We’re not sure but we …………………. go to Prague for Christmas this year.

10. Bill cooked the lunch, so you …………………. expect anything special!

Đáp án:

1. Don’t stand up in the boat! You …………might………. fall in the river!

2. You really …………must………. start spending more time on your work.

3. That’s a really stupid idea! You ……………can……. be serious, surely!

4. Don’t be silly. You …………can’t………. expect me to believe you!

5. I learn to fly! You ………must…………. be joking!

6. Sue says she’s stuck in traffic and she ………… might………. be late.

7. Tell Peter he. ………can…………. stay the night here if he wants to.

8. You …………might not………. realize it, but this is very important to me.

9. We’re not sure but we ……… might…………. go to Prague for Christmas this year.

10. Bill cooked the lunch, so you …………mustn’t………. expect anything special!

Exercise 5. Viết lại các câu sau bằng các từ đã cho

1. It was quite unnecessary for you to carry all those parcels home yourself.

You ……………………………………………………………………………

2. I’m sure it wasn’t Mrs. Mai you saw because she is in Boston.

It can’t …………………………………………………………………

3. Maybe John’s working this weekend.

John ……………………………………………………………………………

4. I didn’t apologize. That was wrong of me.

I should …………………………………………………………………………

5. It wasn’t necessary for me to go out after all.

I needn’t ………………………………………………………………………………

6. I’m sure that you didn’t lock the front door. Here is the key.

You can’t …………………………………………………………………………

7. It was careless of you to leave the windows open last night.

You shouldn’t ……………………………………………………………………………

8. I’m sure Alison made arrangement. I recognized her voice.

It must ……………………………………………………………………

9. I’m sure he didn’t know that his brother was seriously ill.

He couldn’t possibly ……………………………………………………………………………

10. I am sure it was Judy that I saw in town this morning

It must ………………………………………………………………………………

Đáp án:

1. You needn’t have carried all those parcels home yourself.

2. It can’t have been Mrs. Mai you saw because she is in Boston.

3. John may work this weekend

4. I should have apologized. That was wrong of me.

5. I needn’t have gone out after all.

6. You can’t have locked the front door. Here is the key.

7. You shouldn’t have left the windows open last night.

8. It must have been Alison who made arrangement. I recognized her voice.

9. He couldn’t possibly have known that his brother was seriously ill.

10. It must have been Judy that I saw in town this morning.

Exercise 6. put in 'must' or 'can't'

1) Why is that man looking around like that? He ________ be lost.

2) That woman __________ be a doctor! She looks far too young.

3) John always fails the tests, even though he's clever. He __________ study enough.

4) The food is really good at that restaurant. They ________ have a great chef.

5) Who's that at the door? It _________ be Susie - she'll still be at work now.

6) This _________ be John's house. This house has a red door and it's number 24, just like he said.

7) Julie _________ have much money or she would buy a new car. Her old one is falling apart.

8) He _________ be at work now, can he? It's nearly midnight.

9) What a lot of lovely flowers you have! You ______ really like gardening.

10) David _________ drink a lot of coffee. He's finished two packets already this week.

11) This _______ be Jamie's coat. He's tall and this is tiny.

12) Her life ______ be easy. She has four children and very little money.

13) Where's Lucy? She _______ be at the library, as she often goes there at this time.

14) This bill _______ be right! £50 for two cups of coffee!.

15) Emma's amazingly good at the piano. She ______ practise a lot.

16) The car in front is driving so slowly that I think they ______ be looking for something.

17) You've already eaten enough for three people! You _______ still be hungry!.

18) This book _____belong to the library. It's certainly not mine.

19) It only takes three hours to fly from London to Sydney? That _____ be correct!.

20) There ______ be something wrong with the fridge! It's making a very unusual noise.

Đáp án:

1) Why is that man looking around like that? He ___must_____ be lost.

2) That woman _____can't _____ be a doctor! She looks far too young.

3) John always fails the tests, even though he's clever. He ______can't____ study enough.

4) The food is really good at that restaurant. They ____must____ have a great chef.

5) Who's that at the door? It _____can't____ be Susie - she'll still be at work now.

6) This _____must____ be John's house. This house has a red door and it's number 24, just like he said.

7) Julie ____can't_____ have much money or she would buy a new car. Her old one is falling apart.

8) He ______can't___ be at work now, can he? It's nearly midnight.

9) What a lot of lovely flowers you have! You ___must___ really like gardening.

10) David ____must_____ drink a lot of coffee. He's finished two packets already this week.

11) This ___can't____ be Jamie's coat. He's tall and this is tiny.

12) Her life ___can't___ be easy. She has four children and very little money.

13) Where's Lucy? She ____must___ be at the library, as she often goes there at this time.

14) This bill ___can't____ be right! £50 for two cups of coffee!.

15) Emma's amazingly good at the piano. She ___must___ practise a lot.

16) The car in front is driving so slowly that I think they ___must___ be looking for something.

17) You've already eaten enough for three people! You ____can't___ still be hungry!.

18) This book __must___ belong to the library. It's certainly not mine.

19) It only takes three hours to fly from London to Sydney? That __can't___ be correct!.

20) There ____must__ be something wrong with the fridge! It's making a very unusual noise.

Exercise 7. Complete the sentences. Use the present perfect form of the verbs in brackets.

1. Teachers _____ wear suits for work, but their clothes must be neat and clean.

2. Students _____ use their smart phones during the lessons.

3. You ____ arrive on time for the meeting. It's important not to be late.

4. You ____ eat lunch in the school canteen. Some students prefer to go home for lunch.

5. Students and teachers _____ be polite to each other.

6. You _____ buy a portfolio, your teacher will give you one.

7. You _____ eat or drink in any of the classrooms.

8. Students ____ take an exam at the end of the first semester.

Đáp án:

1. Teachers __needn't___ wear suits for work, but their clothes must be neat and clean.

2. Students ___mustn't__ use their smart phones during the lessons.

3. You __must___ arrive on time for the meeting. It's important not to be late.

4. You __needn't___ eat lunch in the school canteen. Some students prefer to go home for lunch.

5. Students and teachers __must___ be polite to each other.

6. You _needn't____ buy a portfolio, your teacher will give you one.

7. You __mustn't___ eat or drink in any of the classrooms.

8. Students ___must__ take an exam at the end of the first semester.

Exercise 8. Fill in the blanks using MUST, MUSTN’T, DON’T HAVE TO, SHOULD, SHOULDN’T, MIGHT, CAN,CAN’T

1. Rose _________________ be good playes. They has won many prizes !

2. You _________________ pay to use the library. It’s free.

3. I’m not sure where my husband is at the moment. He _________________ be at the gym.

4. Jerry _________________ be working today. He never works on Sundays.

5. You _________________ be 18 to see that horror film.

6. You _________________ hear this radio program. It’s very funny.

7. Dad _________________ go to the hospital. His cough is getting worse all the time.

8. You don’t have to shout. I _________________ hear you very well.

9. It _________________ be him. I saw him a week ago, and he didn’t look like that.

10. You look pretty tired. I think you _________________ go to bed early tonight.

Đáp án:

1. Rose ______must__________ be good player. They has won many prizes !

2. You ________don't have to_________ pay to use the library. It’s free.

3. I’m not sure where my husband is at the moment. He ________might_________ be at the gym.

4. Jerry _________can't ________ be working today. He never works on Sundays.

5. You __________must_______ be 18 to see that horror film.

6. You _________must________ hear this radio program. It’s very funny.

7. Dad _________should________ go to the hospital. His cough is getting worse all the time.

8. You don’t have to shout. I ________can_________ hear you very well.

9. It ________can't_________ be him. I saw him a week ago, and he didn’t look like that.

10. You look pretty tired. I think you _________should________ go to bed early tonight.

Exercise 9. Complete the sentences. Use “can/ can’t/ could/ couldn’t”

1. I was short of money last week. I ____________ buy that disk.

2. I am afraid, I ____________ come to your country.

3. When my father was a schoolboy, he was a good runner. He ____________ run very fast.

4. My great grandmother was very clever. She ____________ speak three foreign languages.

5. Denys ____________ swim quite well now. But last summer he ____________ swim at all.

6. My grandfather loved music very much. He ____________ play the piano and the guitar very well.

Đáp án:

1. I was short of money last week. I _____couldn’t_______ buy that disk.

2. I am afraid, I _____can’t_______ come to your country.

3. When my father was a schoolboy, he was a good runner. He ______could______ run very fast.

4. My great grandmother was very clever. She ____could________ speak three foreign languages.

5. Denys _______can_____ swim quite well now. But last summer he ______couldn’t______ swim at all.

6. My grandfather loved music very much. He _______could_____ play the piano and the guitar very well.

Exercise 10. Fill the blank with MUST, MUSTN’T, DON’T HAVE TO, SHOULD, SHOULDN’T, MIGHT, CAN, CAN’T

1. Let me look. I _________________ be able to help you.

2. “Children, you _________________ cross the street if the lights are red !”

3. You _________________ sit so near the TV. It’s bad for your eyes.

4. I’m sorry but I _________________ give you a lift because my car is broken.

5. I _________________ stop and talk to you now. I have to get to the library.

6. You really _________________ go to the Louvre if you’re in Paris. It’s wonderful.

7. You _________________ come to the party if you don’t feel well.

8. I don’t know where Kelly is. She _________________ be at her sister’s .

9. You have passed all your tests. You _________________ be very pleased with yourself.

10. You _________________ smoke in your car, especially if there are children sitting in the
back

Đáp án:

1. Let me look. I ________MIGHT_________ be able to help you.

2. “Children, you _________MUSTN’T________ cross the street if the lights are red !”

3. You _________SHOULDN’T________ sit so near the TV. It’s bad for your eyes.

4. I’m sorry but I ________CAN’T_________ give you a lift because my car is broken.

5. I ________CAN’T_________ stop and talk to you now. I have to get to the library.

6. You really ________MUST/SHOULD_________ go to the Louvre if you’re in Paris. It’s wonderful.

7. You _________DON’T HAVE TO________ come to the party if you don’t feel well.

8. I don’t know where Kelly is. She _______MIGHT_________ be at her sister’s .

9. You have passed all your tests. You ________SHOULD_________ be very pleased with yourself.

10. You _________SHOULDN’T/MUSTN’T________ smoke in your car, especially if there are children sitting in the back

Exercise 11. Complete the sentence with Might/ Can/ Can't/ Could/ Couldn't/ Be able to

1. The businessman from England spoke so fast that I _______ understand him.

2. I would like to ________ ski so quickly.

3. I'm pretty sure Dad is at home. He ________ be working at this time in the evening.

4. It ________ rain this afternoon. It's pretty cloudy already.

5. Please, have patience. I'll _______ help you soon.

6. I didn't have the key so I ________ get inside.

7. My best friend _______ have become a great athlete, but he didn't practice enough.

8. Jimmy ________ take the driving test last year because he was only 17.

9. It is a difficult question but he ________ answer it.

10. It ________ be him. He told me he'd gone to Australia.

Đáp án

1. The businessman from England spoke so fast that I ____COULDN'T____ understand him.

2. I would like to ____BE ABLE TO____ ski so quickly.

3. I'm pretty sure Dad is at home. He ____CAN'T____ be working at this time in the evening.

4. It ____MIGHT____ rain this afternoon. It's pretty cloudy already.

5. Please, have patience. I'll ____BE ABLE TO____ help you soon.

6. I didn't have the key so I ____WASN'T ABLE TO____ get inside.

7. My best friend ____COULD____ have become a great athlete, but he didn't practice enough.

8. Jimmy ____COULDN'T____ take the driving test last year because he was only 17.

9. It is a difficult question but he ____WAS ABLE TO____ answer it.

10. It ____CAN'T____ be him. He told me he'd gone to Australia.

Exercise 12. Choose the correct option

1. Jeff may not/ can’t/ might not ride a bicycle. He never learnt to do it.

2. I’m sure you can’t/ couldn’t/ must be tired. You were awake all night.

3. May/ Should/ Could you close the window? I’m cold.

4. Mobile phones can/ must/ might be switched off during the flight.

5. You really should/ could/ might stop smoking.

6. Drivers can/ may/ should go more slowly. There are many accidents.

Đáp án

1. Jeff can’t ride a bicycle. He never learnt to do it.

2. I’m sure you must be tired. You were awake all night.

3. May/ Could you close the window? I’m cold.

4. Mobile phones must be switched off during the flight.

5. You really should stop smoking.

6. Drivers should go more slowly. There are many accidents.

Exercise 13. Fill in the blanks using MUST, CAN’T, MAY, MIGHT, COULD, SHOULD, SHOULDN’T and the PAST FORMS of them !

1. Sally looks worried . She _____________ a problem with something (HAVE).

2. Bob __________ at school because I haven’t seen him all day (BE).

3. I _______ you the money. Why didn’t you ask me (LEND)

4. Mr Travis hasn’t come to work yet. He has never been late for work. He _________ the bus (MISS).

5. She knew everything about our plans. She _______ to our conversation (LISTEN)

6. A: Will you come to my birthday party tomorrow afternoon ?

B : I’m sorry but I ______ because I have to look after my sister. (COME)

Đáp án

1. Sally looks worried . She _______must have/ must have had______ a problem with something (HAVE).

2. Bob _____can't be_____ at school because I haven’t seen him all day (BE).

3. I _____could have lent____ you the money. Why didn’t you ask me (LEND)

4. Mr Travis hasn’t come to work yet. He has never been late for work. He _____must have missed____ the bus (MISS).

5. She knew everything about our plans. She ____must have listened___ to our conversation (LISTEN)

6. A: Will you come to my birthday party tomorrow afternoon ?

B : I’m sorry but I ___can't come___ because I have to look after my sister. (COME)

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