Công thức thì HTHT

(+) S + has/have + V3/ed 

(-) S + has/have + not + V3/ed 

(?) Has/Have + S+ V3/ed?

DHNB: before, since + mốc thời gian, for + khoảng thời gian, yet, already, just,....

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 QKTD 

(+) S + was/were + Ving 

(-) S + was/were+ not + Ving 

(?) Was/Were +S +Ving? 

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. haven't met 

DHNB: since (HTHT)

2. was built

DHNB: last year (QKD)

3. will be built 

DHNB: next year (TLĐ)

4. is sleeping

DHNB: be quiet! (HTTD)

5. use

suggest + Ving: đề nghị

6. haven't found

DHNB: yet (HTHT)

7. am studying

8. is visited

DHNB: every day (HTĐ)

9. talking

stop + Ving: dừng hẵn 

10. didn't live

S + wish(es)  + S+  QKĐ : ước ở hiện tại

11. hasn't finished

DHNB: yet (HTHT)

12. visited

DHNB: last Sunday (QKD)

13. are playing

DHNB: at the moment (HTTD)

14. buys

DHNB: sometimes (HTD)

15. was having

When + QKĐ, QKTD

16. answered

S + can be + V3/ed (bị động)

17. has worked

HTHT + since + QKĐ

18. haven't finished

DHNB: yet (HTHT)

19. be cut 

S + should + be + V3/ed (bị động)

20. listening

enjoy + Ving: thích 

21. haven't received 

DHNB: since (HTHT)

`color{orange}{~LeAiFuRuiHuiBao~}`