作业帮be doing和doing的用法区别
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be doing和doing的用法区别
be doing和doing的用法区别
be doing和doing的用法区别
前者是进行时,表示某时正在进行的动作.将来进行时：I will be watching the film this time tomorrow.现在进行时：I am having breakfast now.过去进行时：I was reading when he came into my room yesterday.更多的时态你去翻语法书.后者是动名词,动名词短语可以用作需要名词或名词从句的地方.Going shopping is the favorite activity of most girls.
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