Bài 1: (Dấu - ngăn cách cột V và cột V-ed).

meet - met                  enjoy - enjoyed

help  - helped              drive - drove 

speak - spoke               plan - planned.

live - lived                    put - put

write - wrote                stop - stopped

study - studied             sing - sang

do - did                        agree - agreed

cry - cried                     sit - sat

stand - stood                borrow - borrowed

play - played                run - ran

stay - stayed                 begin - began

ask - asked                   break - broke

laugh - laughed            bring - brought

try - tried                      built - built

tidy - tidied                   buy - bought

Bài 2:

1. was

2. were

3. was

4. were

5, was

6. was

7. were

8. was

9. was

10. were

11. were

12. were

13. was

14. was

15. were

Bài 3:.

1. (-) He didn't write a book.

( ?) Did he write a book?

2. (-) She was not my boss

(? ) Was she your boss?

3. (+) They bought a new house

( ? ) Did they buy a new house? 

Bài 3:.

1. (-) He didn't write a book.

    (?) Did he write a book?

2. (-) She was not my boss

    (?) Was she your boss?

3. (+) They bought a new house

    (?) Did they buy a new house? 

Ko có câu 4 mk giúp câu 3 nha