小学英语语法总结:过去完成时

过去完成时

用法:在过去的时间里,两个动作中,发生在前的哪个动作要用过去完成时。

结构:had+过去分词

After she had finished her homework,she went shopping.

They had sold the car before I asked the price.

The train had left before I arrived at the station.

After/before引导的时间状语从句放在句首要在句子后面加逗号,如果放在主句后则不用加。

★变疑问句将助动词移到句首

Had she finished her homework?

★变否定句在助动词后面加not

She hadn't finished her homework.

★肯定回答及否定回答

Yes,she had./No,she hadn't.

★特殊疑问句

What had she done?
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