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 HTĐ (V: tobe)

(+) S + am/is/are ..

(-) S + am/is/are + not .. 

(?) Am/Is/Are + S + ... ? 

I + am

S số ít, he, she, it + is

S số nhiều, you ,we, they + are

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, ...

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

1. was 

DHNB: yesterday (QKD)

2. walks 

DHNB: usually (HTD)

3. is teaching 

DHNB: now (HTTD)

4. Did your father watch 

DHNB: last night (QKD)

5. is searching

DHNB: at the moment (HTTD)

6. won 

DHNB: ago (QKD)

7. is sleeping 

8. were 

DHNB: yesterday (QKD)

9. Was he 

DHNB: yesterday (QKD)

10. wasn't 

DHNB: last night (QKD)

11. were you 

DHNB: yesterday (QKD)

12. is ringing 

DHNB: Listen! (HTTD)

13. received 

DHNB: yesterday (QKD)

14. is 

DHNB: today

15. am not 

DHNB: now 

16. is 

17. Is this computer 

18. are 

19. are 

20. Is Annie 

`color{orange}{~MiaMB~}`