完成时具体的语法知识

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完成时具体的语法知识
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完成时具体的语法知识
完成时具体的语法知识

完成时具体的语法知识
现在完成时:have/has done时间状语:already ,yet ,since ,so far(到目前为止) up to now(到目前为止) recently.in the past /last years在过去的几年中
现在完成进行时:have/has been doing
过去完成时:had done时间状语;by,before等介词,told,said,knew,heard,thought,think,want,hope,mean,plan,intend,hardly…when…,no sooner…than…,It was the first (second,etc) time (that