1.

(-) Nam didn't write an essay in literature class this morning

(?) Did Nam write an essay in literature class this morning?

2. 

(-) I didn't watch tv yesterday morning.

(?) Did you watch tv yesterday morning?

3.

(-) Nam and you weren't in the english club last Tuesday.

(?) Were Nam and you in the english club last Tuesday?

4.

(-) They didn't eat noodles two hours ago.

(?) Did they eat noodles two hours ago?

5.

(-) We didn't always have a nice time on Christmas holiday in the past.

(?) Did you always have a nice time on Christmas holiday in the past?

6. 

(-) My father didn't decorate the Christmas tree 

(?) Did your father decorate the Christmas tree?

7.

(-) She didn't buy a new dress yesterday.

(?) Did she buy a new dress yesterday?

8.

(-) They weren't late at school.

(?)  Were they late at school?

9.

(-) Mr.Tam didn't take his children to the museum last Sunday.

(?) Did mr.Tam take his children to the museum last Sunday?

10.

(-) Hoa didn't make a cushion for her armchair.

(?)  Did Hoa make a cushion for her airmchair?

#Chúcbạnhọctốtnha ^^