1/ they didn't stop at the post office
2/ we didn't walk to school yesterday
3/ she didn't dance beautifully
4/ I didn't have egg for breakfast
5/ We didn't talk about animals
6/ They didn't watch a movie
7/ She didn't clean the board
8/ My mom didn't clean the housse
9/ I didn't phone my friend
10/ She didn't do her homework
CÂU PHỦ ĐỊNH
Cấu trúc: S + was/were not + N/Adj
Lưu ý: was not = wasn’t
were not = weren’t did not = didn’t
Cấu trúc: S + did not + V (nguyên thể)