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 TLĐ 

(+) S + will + V1 

(-) S + won't + V1 

(?) Will + S+ V1? 

DHNB: in the future, in + năm ở TL, in + time, next week, next year, ....

Công thức thì QKTD 

(+) S + was/were + Ving 

(-) S + was/were+ not + Ving 

(?) Was/Were +S +Ving? 

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. joined / was 

QKD + when + QKD 

2. lost / has been 

DHNB: last month (QKD), since (HTHT)

3. was

DHNB: last night (QKD)

4. won't go / will stay 

DHNB: tomorrow (TLD)

5. will have ended / get 

By the time + HTĐ, TLHT

TLHT: S + will have + V3/ed 

6. had finished / invited

After + QKHT, QKD

7. went / had finished 

After + QKHT, QKD

8. was ironing 

DHNB: at 5 a.m yesterday (QKTD)

9. died

DHNB: ago (QKD)

10. told 

DHNB: last week (QKD)

11. will come 

DHNB: next weekend (TLD)

12. was walking / was swimming 

QKTD+  while + QKTD

hành động diễn ra song song / cùng lúc 

13. had buzzed / answered 

After + QKHT, QKD

14. was watching

DHNB: at 5 p.m yesterday (QKTD)

15. will look 

DHNB: next Sunday (TLĐ)

`color{orange}{~MiaMB~}`