否定句是在was/were后面加not, was not （wasn't）/were not （weren't）。

一般疑问句是把was / were提前并放到句首，要求首字母要大写。

b. 实义动词过去式的句式。

①肯定式：主语+动词过去式+其它。

如：They had a good time yesterday.

②否定式：主语+did not（didn't）+动词原形+其它。

如：They didn't watch TV last night.

③一般疑问句：Did+主语+动词原形+其它？

肯定回答：Yes,主语+did.

否定回答：No,主语+didn't.

如：Did they have a meeting two days ago? 两天前他们开了个会吗?

Yes,they did. / No,they didn't.

④特殊疑问句=特殊疑问词+一般疑问句：即特殊疑问词+did+主语+动词原形+其它？

如：What time did you finish your homework? 你什么时候完成作业的？

一般过去时的时间状语都是明显表示过去的，如：yesterday、last night、last week、in 1998、three months ago, three years ago, just now.等。