在什么情况下用be动词 和does do did最好是给一个例句 ,

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在什么情况下用be动词 和does do did最好是给一个例句 ,
在什么情况下用be动词 和does do did
最好是给一个例句 ,

在什么情况下用be动词 和does do did最好是给一个例句 ,
如果你要跟的是一个实义动词,那就要用does,do,did,比如,I did not finish my homework,(不用翻译吧.),再比如,Do you like watching TV?
finish like 都是有实际意义的动词.
如果你要跟的是一个形容词,副词,那就用系动词.比如,i am happy now.happy 就是一个形容词.i am here.here 就是一个副词.
你这么问应该学英语不久吧.慢慢来,看得多了就好了.

1.be 动词分为一般式am,is,are,过去式was,were等,其后加上形容词,名词等作表语,构成“主系表”结构,如:I am tall. He is a teacher.等
be+现在分词,构成进行时,如:They are running on the playground.
I was watching TV this time yesterday.
be+过去分...

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1.be 动词分为一般式am,is,are,过去式was,were等,其后加上形容词,名词等作表语,构成“主系表”结构,如:I am tall. He is a teacher.等
be+现在分词,构成进行时,如:They are running on the playground.
I was watching TV this time yesterday.
be+过去分词,构成被动语态,如:He was praised by the teacher.
They were invited to the party.
2.does, do, did 本身有实际意义“做”,如:He does homework everyday. I do homework everyday. We did our homework yesterday.
帮助主要动词构成疑问句和否定句,如:Did he come yesterday? I don't know.

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