`1.` 

`(-)` Annis wasn't the best singer of our school.

`(?)` Was Annis the best of our school?

Giải thích: thì QKĐ đối với tobe

`\text{(-) S + was/were not + ...}`

`\text{(?) Was/Were + S + ...?}`

`2.` 

`(-)` We didn't go to school by bus.

`(?)` Did we go to school by bus?

Giải thích: thì QKĐ đối với đt thường

`\text{(-) S + didn't + V-bare + ...}`

`\text{(?) Did + S + V-bare + ...?}`

`3.`

`(-)` Minh didn't win the first prize last year.

`(?)` Did Minh win the first prize last year?

Giải thích: thì QKĐ đối với đt thường

`\text{(-) S + didn't + V-bare + ...}`

`\text{(?) Did + S + V-bare + ...?}`

`4.`

`(-)` They didn't live in a small house.

`(?)` Did they live in a small house?

Giải thích: thì QKĐ đối với đt thường

`\text{(-) S + didn't + V-bare + ...}`

`\text{(?) Did + S + V-bare + ...?}`

$chucbanhoctot$
$#thaonguyeneakar$