摘要： 过去完成时 主动语态:had done 被动语态:had been done The classroom looked tidy. We had cleaned it. 教室看起来很整洁.我们已经打扫过了. The classroom looked tidy. It had been cleaned. 教室看起来很整洁.它已经被打扫过了. His newly written novel had been translated into English by the end of last month.上个月末.他刚写的小说已被翻译成了英语. She told me that she had been dismissed by her boss. 她告诉我.她的老板已把她解雇了. Her homework had not been finished when I got home. 我到家的时候.她的作业还没有完成.

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