构成: Tom came to China last year. He was a student 3 years ago. They were all at home yesterday.

1. 谓语为一般动词时: 主语 + 动词过去式 + 其他

2. 谓语为be 动词时: 主语+ be (was, were) + 其他

The past simple tense 一般过去时

考点梳理