`III.`

`2.` 

`(-)` She didn't ride a bike last Sunday.

`(+)` Did she ride a bike last Sunday?

`3.` 

`(-)` They didn't do their homework last night.

`(?)` Did they do their homework last night?

`4.` 

`(-)` I didn't eat pizza two days ago.

`(?)` Did you eat pizza two days ago?

`IV.`

`1.` I played computer games last night.

`2.` She didn't ride a bike yesterday.

`3.` Did he climb the tree two days ago?

`-` Yes, he did.

`4.` Did they read a book last Sunday?

`------`

`***` Quá khứ đơn:

`(-)` S `+` Ved`/` Vc2

`(-)` S `+` didn't `+` V`-`infi

`(?)` Did `+` S `+` V`-`infi `?`

bài3

2

(-)she did not ride a bike last Sunday

(?) Did she ride a bike last Sunday?

3

(-) they did not do their homework last night

(?) Did they do their homework last night

4

(-) I did not eat pizza two days ago

(?)Did you eat pizza two days ago ?

bài 4

1. played computer games

2. did not ride a bike

3.clamb the tree

he did

4.Did

yes,they did

bài này bạn áp dụng công thức thì QUÁ KHỨ ĐƠN là ra nhé