★這篇《新概念英語(yǔ)語(yǔ)法總結(jié)：過(guò)去完成時(shí)》，是特地為大家整理的，希望對(duì)大家有所幫助！
    過(guò)去完成時(shí)
    用法：在過(guò)去的時(shí)間里，兩個(gè)動(dòng)作中，發(fā)生在前的哪個(gè)動(dòng)作要用過(guò)去完成時(shí)。
    結(jié)構(gòu)：had+過(guò)去分詞
    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引導(dǎo)的時(shí)間狀語(yǔ)從句放在句首要在句子后面加逗號(hào)，如果放在主句后則不用加。
    ★ 變疑問(wèn)句將助動(dòng)詞移到句首
     Had she finished her homework?
    ★ 變否定句在助動(dòng)詞后面加not
    She hadn't finished her homework.
    ★ 肯定回答及否定回答
    Yes, she had. / No, she hadn't.
    ★ 特殊疑問(wèn)句
    What had she done?