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過去完成時(shí)
用法:在過去的時(shí)間里,兩個(gè)動作中,發(fā)生在前的哪個(gè)動作要用過去完成時(shí)。
結(jié)構(gòu):had+過去分詞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)間狀語從句放在句首要在句子后面加逗號,如果放在
主句后則不用加。
★變疑問句將助動詞移到句首Had she finished her homework ?
★變否定句在助動詞后面加not She hadn't finished her homework.
★肯定回答及否定回答Yes , she had. / No, she hadn't.
★特殊疑問句What had she done ?
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