新概念英语第一册的语法:新概念英语第一册语法知识梳理：一般过去时

一般过去时
　　表示过去发生的动作或事件，常和表示过去的时间状语连用，如yesterday, last night, the day before yesterday, 3 days ago...
　　含有be动词的句子，将be动词变为过去式。am, is的过去式为was, are的过去式为were：
　　I was at the butcher's.
　　You were a student a year ago.
　　The teacher was very beautiful ten years ago.
　　★变疑问句将be动词移动到句首
　　Were you at the butcher's?
　　Were you a student a year ago?
　　Was the teacher very beautiful ten years ago?
　　★变否定句在be动词后面加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.
　　★特殊疑问句
　　What did you do?(必背)
　　不含有be动词的句子，将动词变为过去式：
　　I finished my homework yesterday.
　　The boy went to a restaurant.
　　The Sawyers lived at King Street a year ago.
　　★变疑问句在句首加did，动词变为原型
　　Did you finish your homework yesterday?
　　Did the boy go to a restaurant?
　　Did the Sawyers live at King Street a year ago?
　　★变否定句在主语和动词之间加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.

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