* Quá khứ đơn :

- Động từ thường :

`( + )` S + V-ed +...

`( - )` S + didn't + V-inf +...

`( ? )` Did + S + V-inf +...

- Động từ tobe :

`( + )` S + was / were +...

`( - )` S + wasn't / weren't`

`( ? )` Was / Were + S +...

Áp dụng :

`1.` were

`2.` went

`3.` Did

`4.` didn't

`5.` visited

`6.` bought

`7.` was

`8.` didn't go 

1. were

- Dấu hiệu : yesterday evening

- All of us là số nhiều nên + were

2. went

- Dấu hiệu : last summer vacation

3. Did

- Dấu hiệu : last week

4. didn't 

- Dấu hiệu : last week

5. visited

- Dấu hiệu : last weekend

6. bought

- Dấu hiệu : yesterday

7. was

- Dấu hiệu : last night

- My mother là số ít nên + was

8. didn't go

- Dấu hiệu : last sunday

* Thì QKĐ với động từ thường :

(+) S + Ved/V2

(-) S + didn't + V-bare

(?) Did + S + V-bare ?

* Thì QKĐ dạng tobe :

(+) S + was/were + ...

(-) S + was/were + not + ...

(?) Was/Were + S + ... ?