IV

1.didn't go

2.was

3.Did/attend

4.played

5.finished

6.Did you study

7.got

8.were

9.got/had

10.listened

V

1.C.but

2.B.buyed

3.A.listens

4.B.drove

5.A.visit 

6.A.play

VI

1.B.weather

2.A.delicious

3.C.but

4.A.went

*Công thức thì quá khứ đơn với tobe:

+) S+was/were+.....

-) S+was/were+not+.....

?) Was/Were+S+....+?

*Công thức thì quá khứ đơn với động từ thường:

+) S+V-ed/V bất quy tắc +....

-) S+ didn't + V-nguyên+....

?) Did +S+ V-nguyên+....+?

IV
1. didn't go
2. was
3. Did you attend...?
4. played
5. finished
6. Did you study...?
7. got
8. were
9. got/ had
10. listened
* Công thức thì QKĐ:
+) S + Ved/2 
- ) S + didn't + V(inf )
? ) Did + S + V ?
* Công thức were/ was:
+) S + was/ were + V
- ) S + wasn't/weren't + V
? ) Was/Were + S + V...?
Bài 5:
1. C ( But ⇒ so )
2. B ( Buyed ⇒ Bought )
3.  A ( Listens ⇒ Listened )
4. B ( Drove ⇒ drive )
5. A ( Visit ⇒ visited )
6. A
Bài 6:
1. B weather

2. A delicious

3. C but

4. A went
@Meii