1) We seldom (eat). . . . . . . . . . Before 6 o'clock. 2) The sun (rise) . . . . . . . .. . . In the East and (set). . . . . . In the West. 3) I (do) . . . . . . . . . . . an exercise on the present tenses at this moment. 4) It (be). . . . . . . . . .very cold i winter. 5) My mother sometimes (buy) . . . . . . . . . . . .vegetable at this market. 6) Before she (watch) . . . . . . . . . . . .TV,she (do) . . . . . . . . . . . .her duty. 7) It was the first time I (ever see). . . . . . . . . . . . . . . . . . . . . .such a beatiful girl. 8) He (go) . . . . . . . . . . . . . . . . . . . . .to the store before he (go) ........................home. 9) I think he (be)...............................the next President of the United States. 10) He (sit).....................in a bar when I (see)................him. 11) They (begin)..................................to study at this school 7 years ago. 12) The teacher (already, tell)...............................to be quite. 13) Mary (lose)...............................her hat for 2 days. 14) I (live).................... .........is London since 1990. 15) He promised (cone).............................back here. 16) Yesterday they (go)................................home after they (finish)................................their work. 17) Last night before he (watch).................................TV, he (do).........................the exercise. 18) She (water)..........................the flowers next moth. 19) By May year we (stuty)................English for 3 years. 20) He (finish)..................his work since yesterday.

1. have eaten

Cấu trúc thì hoàn thành :

S+have/has+Ved/PII+...

2. rises - sets

Cấu trúc thì hiện tại đơn :

S+Vs/es+...

3. am doing

Cấu trúc thì tiếp diễn:

S+am/is/are+.....

4. is

Động từ to be : "is"

5. buys

Cấu trúc thì hiện tại đơn :

S+Vs/es+...

6. watches - does

Cấu trúc thì hiện tại đơn :

S+Vs/es+...

7. have ever seen

Cấu trúc thì hoàn thành :

S+trạng từ nếu có +have/has+Ved/PII+...

8. had gone - went

Cấu trúc thì quá khứ hoàn thành :

S+had+Ved/PII+...

Cấu trúc thì quá khứ :

S+Ved/ĐT bất quy tắc+....

9. will be

Cấu trúc thì tương lai đơn :

S+will+V nguyên thể+...

10. was sitting - saw

Cấu trúc thì quá khứ tiếp diễn :

S+was/were+Ving+...

Cấu trúc thì quá khứ :

S+Ved/ĐT bất quy tắc+....

11. began

Cấu trúc thì hoàn thành :

S+trạng từ nếu có +have/has+Ved/PII+...

12. has already told

Cấu trúc thì hoàn thành :

S+trạng từ nếu có +have/has+Ved/PII+...

13. has lost

Cấu trúc thì hoàn thành :

S+trạng từ nếu có +have/has+Ved/PII+...

14. have lived

Cấu trúc thì hoàn thành :

S+trạng từ nếu có +have/has+Ved/PII+...

15. coming

*to come có thể viết thành coming

16. went - finished

Cấu trúc thì quá khứ :

S+Ved/ĐT bất quy tắc+..

17. watched - had done

Cấu trúc thì quá khứ :

S+Ved/ĐT bất quy tắc+..

Cấu trúc thì quá khứ hoàn thành :

S+had+Ved/PII+...

18. will water

Cấu trúc thì tương lai đơn :

S+will+V nguyên thể+...

19. have studied

Cấu trúc thì hoàn thành :

S+trạng từ nếu có +have/has+Ved/PII+...

20. has finished

Cấu trúc thì hoàn thành :

S+trạng từ nếu có +have/has+Ved/PII+...

$#lam$

1. eat

2. rises - sets

3. am doing

4. is

5. buys

6. watches - does

7. have ever seen

8. had gone - went

9. will be

10. was sitting - saw

11. began

12. has already told

13. has lost

14. have lived

15. to come

16. went - finished

17. watched - had done

18. will water

19. have studied

20. has finished