`Đáp` `án:`

`color{red}{~Bài1~}`

1. cooks

DHNB: every day (HTĐ)

2. didn't go

DHNB: last year (QKĐ)

3. isn't doing / think / are playing

DHNB: at the moment (HTTD)

4. Did she bake

DHNB: yesterday (QKĐ)

5. drink / are having

DHNB: usually (HTĐ), now (HTTD)

6. saw / was

DHNB: ago (QKĐ)

7. is singing

DHNB: Listen! (HTTD)

8. like 

9. took part in 

DHNB: last week (QKĐ)

10. did she study

DHNB: last Monday (QKĐ)

11. is helping

DHNB: now (HTTD)

12. visit

DHNB: often (HTĐ)

13. did / got / had

DHNB: yesterday (QKĐ)

14. was / went

15. is swimming

DHNB: Look! (HTTD)

16. are learning

17. arrived / ate / did

DHNB: yesterday (QKĐ)

18. am looking

19. goes / is going

DHNB: often (HTĐ), today (HTTD)

20. leaves 

`color{red}{~Bài2~}`

1. is dancing

DHNB: Look! (HTTD)

2. felt 

3. is always making 

S + am/is/are + always + Ving: hđ lặp đi lặp lai nhiều lần làm cho người nói bực mình 

4. is sleeping

5. listens

DHNB: every night (HTĐ)

6. were / thought 

7. didn't win

DHNB: in 2010 (QKĐ)

8. Did you like / borrowed

DHNB: yesterday (QKĐ)

9. don't go 

10. lost 

DHNB: yesterday (QKĐ)

11. washes

DHNB: twice a week (HTĐ) 

-------------------------------------

Công thức thì HTĐ (V: thường)

S số ít, he, she, it 

(+) S + Vs/es

(-) S+ doesn't + V1 

(?) Does +S +V1?

S số nhiều, I, you, we, they

(+) S + V1 

(-) S+ don't + V1 

(?) Do + S+ V1? 

DHNB: always, usually, sometimes, often, never, seldom,....

Công thức thì HTTD 

(+) S + am/is/are + Ving 

(-) S + am/is/are + not + Ving 

(?) Am/Is/Are +S +Ving? 

DHNB: now, right now, (!), at present, at the moment,.....

Công thức thì QKĐ (V: to be)

(+) S + was/were + ... 

(-) S + was/were + not ... 

(?) Was/Were + S ... ? 

S số ít, I, he, she, it + was

S số nhiều, you, we ,they + were

Công thức thì QKĐ (V: thường)

(+) S + V2/ed 

(-) S + didn't + V1 

(?) Did + S+ V1?

DHNB: ago, last (year, month ...), yesterday, in + năm QK, ...