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新概念英语语法总结3

分类:新概念英语发布于:2015/1/23
    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。
    5 变疑问句将助动词移到句首
    Had she finished her homework?
    6 变否定句在助动词后面加not
    She hadn’t finished her homework.
    7 肯定回答及否定回答
    Yes, she had. No, she hadn’t.
    8 特殊疑问句:
    What had she done?

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