Thứ năm, 16/05/2024
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Câu hỏi:

07/09/2022 93

Professor Smith explained the lecture slowly____________.

A. as soon as his students understood it clearly.


 

B. so that his students can understand it clearly



C. unless his students fail to understand it clearly


D. so that his students could understand it clearly

Đáp án chính xác
 Xem lời giải

Trả lời:

verified Giải bởi Vietjack

Đáp án D

Chúng ta dựa vào từ khóa của 2 vế câu: explain slowly và understand clearly. Nếu ta chọn phương án A. Liên từ as soon as sử dụng không phù hợp vì liên từ này dùng để thể hiện một hành động xảy ra liền ngay sau một hành động khác (ngay khi mà...). Hành động explain slowly không phải là hành động liền ngay sau understand clearly (không phù hợp về mặt logic và nghĩa của câu).

Nếu ta chọn đáp án C ta thấy động từ trong mệnh đề unless đang dùng sai thời với động từ của mệnh đề chính (hiện tại đơn - quá khứ đơn) → đáp án B không chính xác.

Chỉ còn lại 2 phương án B và D. Ta thấy hai phương án đang thể hiện mục đích của hành động explain slowly là để understand clearly. Khi thể hiện mục đích ta có thể sử dụng so that + mệnh đề. Động từ của câu đang chia ở quá khứ (explained) → động từ trong mệnh đề cũng sẽ chia quá khứ → đáp án D đúng Tạm dịch. Giáo sư Smith giảng bài một cách chậm rãi để học sinh của ông thật sự hiểu bài

For review

Khi muốn thể hiện mục đích, chúng ta có thể sử dụng các cấu trúc sau:

- S + V + (not) to V/ in order (not) to V/ so as (not) to V: ai đó làm việc gì để làm gì/ không làm gì

- S1+ V1+ so that/ in order that S2+ V2 trong đó:

+ Nếu V1 ở hiện tại/ tương lai thì V2 = will/ can (not) V

+ Nếu V1 ở quá khứ thì V2 = would/ could (not) V

- With a view to (not) V-ing, S + V: để (không) làm gì, thì ai đó làm gì

Câu trả lời này có hữu ích không?

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