EX2;

1. stay -> stayed

2. go -> went

3. watch -> watched

4. do-> did

5. be -> was/were

6. write -> wrote

7. live -> lived

8. spend -> spent

9. have -> had

10. visit -> visited

11. study -> studied

12. eat -> ate

13. take -> took

14. make -> made

15. read -> read

16. watch -> watched

17. talk -> talked

18. stop -> stopped

19. begin -> began

20. run -> ran

EX3:

1. met

2. Did (you) watch

3. bought

4. (What) did (you) do

went

5. took

6. Did (they) go

7. didn't learn

8. weren't

9. were

10. wrote

11. Did (she) bring

brought

12. lived

13. had

14. spent

CHÚC BẠN HỌC TỐT!!!!

=>
Ex2/
1. stayed
2. went
3. watched
4. did
5. was/were
6. wrote
7. lived
8. spent
9. had
10. visited
11. studied
12. ate
13. took
14. made
15. read
16. watched
17. talked
18. stopped
19. began
20. ran
Ex3/
1. met
2. Did you watch
3. bought
4. did you do/went
5. took
6. Did they go
7. didn't learn
8. weren't
9. were
10. wrote
11. Did she bring/brought
12. lived
13. had
14. spent

Thì QKĐ :

(+) S + V2/ed +...

(-) S + didn't V +...

(?) Did S V?