`1`/ Petro didn't play football last Sunday.

`2`/ I didn't watch TV last night.

`3`/ Aya didn't listen to music yesterday evening.

`4`/ The cat didn't climb the tree yesterday.

`5`/ It didn't rain last week.

Công thức QKD(-):

`(-)` S + didn't + v-infinite +  ........

Exercise `5`:
No, it didn't

No, she didn't

Yes, + S + did

No, + S + didn't 

EX4:

1. Pedro didn't play football last Sunday

2. I didn't watch TV last nigth

3. Aya didn't listen to music yesterday evening

4. The cat didn't climb the tree yesterday

5. It didn't rain last week

EX 5:

2. No, it didn't ( Không chọn Yes, they did vì câu hỏi chủ ngữ là it là số ít nên khi trả lời không thể dùng they được )

3. Yes, they did ( Không chọn No, she didn't vì câu hỏi có chủ ngữ là mum and dad là số nhiều nên khi trả lời không thể dùng she được )

- Cấu trúc ( quá khứ đơn với động từ thường ): 

(+) S + Ved/pp

(-) S+ didn't ( did not )+ V ( inf )

(?) Did + S + V( inf )?

- Yes, S + did

- No, S+ didn't