1.谓语动词是be的情况
was是am和is的过去式，were是are的过去式，所以be动词的过去式有人称和数的变化。
肯定句：主语+was/were+其他
否定句：主语+was/were+not+其他
特殊疑问句：特殊疑问词+was/were+主语+其他。
一般疑问句：was/were+主语+其他?
肯定回答：Yes,主语+was/were.
否定回答：No,主语+wasn't/weren't
如：I was late yesterday.我昨天迟到了。They were in Beijing last year.
去年他们在北京。
I wasn't at home yesterday.昨天我没在家。
When were you born?你是什么时候出生的？
Where were you last night?昨晚你在哪里？
-Was your weekend OK?你周末过得还行吧？
-Yes, it was.是的，还行。
-No, it wasn't.不，不行。
2.谓语动词是实义动词的情况
肯定句：主语+动词的过去式+其他
否定句：主语+did not(didn't)+动词原形+其他
特殊疑问句：特殊疑问词+did+主语+动词原形+其他？
一般疑问句:Did+主语+动词原形+其他
肯定回答：Yes, 主语+did.
否定回答：No, 主语+didn't.
如：I played basketball last Sunday.我上个星期天打篮球了。
She worked in Shanghai five years ago.五年前她上海工作。
I didn't see you yesterday.昨天我没看见你。
We didn't clean our classroom this afternoon.今天下午我们没有打扫教室。
What time did you finish your homework?你什么时候完成你的家庭作业？
-Did you clean your bedroom last Sunday?上个星期天你打扫卧室了吗？
-Yes, I did.是的，我打扫了。
-No, I didn't.不，我没打扫。
