表示過去發(fā)生的動(dòng)作或事件，常和表示過去的時(shí)間狀語連用，如yesterday, last night, the day before yesterday, 3 days ago...
含有be動(dòng)詞的句子，將be動(dòng)詞變?yōu)檫^去式。am, is的過去式為was, are的過去式為were：
I was at the butcher's.
You were a student a year ago.
The teacher was very beautiful ten years ago.
★變疑問句將be動(dòng)詞移動(dòng)到句首
Were you at the butcher's?
Were you a student a year ago?
Was the teacher very beautiful ten years ago?
★變否定句在be動(dòng)詞后面加not
I was not at the butcher's.
You were not a student a year ago.
The teacher was not very beautiful ten years ago.
★肯定回答否定回答
Yes, I was. / No, I was not.
Yes, you were. / No, you were not.
Yes, he/she was. / No, he/she was not.
★特殊疑問句
What did you do?(必背)
不含有be動(dòng)詞的句子，將動(dòng)詞變?yōu)檫^去式：
I finished my homework yesterday.
The boy went to a restaurant.
The Sawyers lived at King Street a year ago.
★變疑問句在句首加did，動(dòng)詞變?yōu)樵?br /> Did you finish your homework yesterday?
Did the boy go to a restaurant?
Did the Sawyers live at King Street a year ago?
★變否定句在主語和動(dòng)詞之間加did not
I did not finish my homework yesterday.
The boy did not go to a restaurant.
The Sawyers did not live at King Street a year ago.
★肯定回答及否定回答
Yes, I did. / No, I didn't.
Yes, he did. / No, he didn't.
Yes, they did. / No, they did not.
