had done是表示过去完成时
when是当……的时候
had done.when 例句
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相关问题
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hardly(had done)...when(did)...no sooner...than 给个例句
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帮忙用was/were doing .when ; be about to do.when;had just done.
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帮忙用was/were doing .when ; be about to do.when;had just done.
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倒装高手请进Only when he had done it___that he had made a mistake.
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英语had done 和had been done区别
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have done.have been done .had done.had been done 有什么区别?怎么用?有
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when done,when being done,when doing的区别
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have done 和 had done区别
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来一位高手辨析一下这个英语区别has done had done has been done had been done
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have done和 had done有什么区别?