转化为现在完成进行时态 1、I taught here last year 2、he baganto make model planes when he was six

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转化为现在完成进行时态 1、I taught here last year 2、he baganto make model planes when he was six

转化为现在完成进行时态 1、I taught here last year 2、he baganto make model planes when he was six
转化为现在完成进行时态 1、I taught here last year 2、he baganto make model planes when he was six

转化为现在完成进行时态 1、I taught here last year 2、he baganto make model planes when he was six
I has been teaching here since last year
he has been making model planes since he was six(begin 是瞬间动词 不能用现在完成进行时)

修改了两遍。。。我觉得这个题目有问题。
现在完成时是要一个现在的界限的吧,比如在今天之前,昨天之前已经完成的是。这个界限楼主没有给出啊~

I have been teaching here for 1 year.
he has been making model planes since he was six.

have been teaching since last year
He has been making model planes since he was six.

I have been teaching here since last year
He has been making model planes since he was six

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