Make the sentence negatve 1.Lan bought a new dress yesterday .................................................................... 2.They were late for school .................................................................... 3.Mr.Ben took his children to the zoo last Sundy . .................................................................... 4.Mai made a mistake in her erem. ....................................................................

`1.` Lan didn't buy a new dress yesterday

`2.` They weren't late for school

`3.` Mr.Ben didn't take his children to the zoo last Sunday

`4.` Mai didn't make a mistake in her exam

`----`

Công thức thì QKĐ

`-` Với tobe

`(+)` S + tobe(was/were) + adj/N

`(-)` S + tobe(was/were) + not + adj/N

`-` Với động từ

`(+)` S + V2/ed + ....

`(-)` S + didn't + Vinf

`1.` Lan didn't buy a new dress yesterday.

`2.` They weren't late for school.

`3.` Mr. Ben didn't take his children to the zoo last Sunday.

`4.` Mai didn't make a mistake in her exam.

`------`

`Note:` Thì QKĐ:

`-` Với động từ thường:

`(+)` S + Ved/2...

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

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

`-` Với tobe:

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

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

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