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一般过去时的构成：
a. be动词过去式的句式。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? Yes，they did. / No，they didn't.
④特殊疑问句：特殊疑问词+did+主语+动词原形+其它？如：What time did you finish your homework?
一般过去时的用法：
①一般过去时的基本用法
a)表示过去某个特定时间发生的动作或存在的状态。
