Câu hỏi:
04/04/2022 244Choose the best answer.
While we ................................. in the park, Mary fell over.
A. ran
B. are running
C. was running
D. were running
Trả lời:
2 hành động xảy ra trong quá khứ: 1 hành động đang diễn ra (chia quá khứ tiếp diễn) thì có 1 hành động khác xen ngang (chia quá khứ đơn).
Cấu trúc phối hợp thì giữa 2 hành động: When/ While + S + V-ed/V cột 2, S + was/were + V-ing
=>While we were running in the park, Mary fell over.
Tạm dịch: Khi chúng tôi đang chạy trong công viên, Mary bị ngã.
Đáp án cần chọn là: D
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