Ét ô ét mọi ngừi ưi!

`1` was sweeping `-` rang .

`2` were playing `-` hit .

`3` was having `-` stopped .

`4` got `-` were waiting .

`5` took `-` were laughing .

`6` was reading `-` was learning `-` was doing .

`7` were playing `-` came .

`8` rang `-` was sitting .

`9` entered `-` turned .

`10` walked `-` was working .

`-` Hành động đang diễn ra thì hành động khác xen vào .

`=>` Đang diễn ra : S + was/were + V_ing + O ...

`=>` Xen vào : S + V(quá khứ) + O ...

`-` Hai hành động đều đã đang xảy ra trong quá khứ .

`=>` S + was/were + V_ing + O ...

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, ...

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Hành động kéo dài trong quá khứ --> QKTD

Hành động ngắn / cắt ngang --> QKĐ

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1. was sweeping / rang

2. were playing / hit

3. was having / stopped 

4. got / were waiting

5. took / were laughing 

6. was reading / was learning / was doing

7. were playing / came

8. rang / was sitting

9. entered / turned

10. walked / was working 

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