1)while peter (watch) the football match last night his sister ( repair) her bike . 2) He ( work) as a cashier for twenty years before his retiment. 3) My parents (live) in London . They live there all theirs lives 4) when he ( return) tomorrow , i (give) him the keys 5) IT (be) three years since i last (see) you. 6) Oh no! WE're too late . The train (already/ leave) 7) The phone is ring . Ok i answer it 8) I didn't like him - he ( contually/ borrow) money Làm ơn giúp mình, mình đang vội!

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, ...

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 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,.....

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1. was watching / was repairing 

2. has worked 

DHNB: for twenty years (HTHT)

3. live

4.. returns / will give 

5. has been / saw 

HTHT + since + QKD

6. has already left 

DHNB: already (HTHT)

8. was continually borrowing 

be + always / continually + Ving: hành động lặp đi lặp lại nhiều lần làm cho người nói bực mình 

`color{orange}{~MiaMB~}`