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 QKTD 

(+) S + was/were + Ving 

(-) S + was/were+ not + Ving 

(?) Was/Were +S +Ving? 

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, ....

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I)

1. will practice 

2. walks 

DHNB: always (HTD)

3. were drinking 

DHNB: at 6.30 yesterday (QKTD)

4. was reading 

While  +QKTD, QKD

Hành động đang diễn ra (QKTD) - hành động cắt ngang (QKĐ)

5. was preparing 

DHNB: at this time last night (QKTD)

6. were you doing 

DHNB: at 7 p.m last Monday (QKTD)

7. were you going 

QKTD + when + QKĐ

8. weren't going 

QKTD + when + QKĐ

9. wasn't doing 

QKTD + when + QKĐ

10. was reading / were playing 

QKTD + while + QKTD

Hành động diễn ra song song / cùng lúc (QKTD)

`color{orange}{~MiaMB~}`