英语过去式解答

Su Hai didn't take any photos at the Sports Meeting.
Did Su Hai take any photos at the Sports Meeting? Yes,he did./No,he didn't.

Nancy didn't go to school early the day before yesterday.
Did Nancy go to school early the day before yesterday? Yes,she did./No,she didn't.

We didn't sing sny English songs.
Did you sing sny English songs?
Yes,we did./No,we didn't.

Su Hai didn't take any photos at the Sports Meeting.
Did Su Hai take any photos at the Sports Meeting?
Yes,he did./No,he didn't.

Nancy didn't go to school early the day before yesterday.
Did Nancy go to school early the day before yesterday?
Yes,she did./No,she didn't.

We didn't sing any English songs.
Did you sing any English songs?
Yes,we did./No,we didn't.
一般过去时的句子变否定句时,只需要在谓语动词前加didn't,并且谓语动词必须变原形。
变一般疑问句时,在句首加did,并且谓语动词也要必须变原形。