Lily with her parents_______ the Greener China since two yea

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Lily with her parents_______ the Greener China since two years ago.A.have joined B.has joined
C.has been in D.have been in
为什么不用B,has joined?

这是现在完成时中非常重要的一点,即短暂性动词不能与一段时间连用.“自从两年前到现在”为一段时间,而“join加入”为短暂性动词,更多的短暂性动词还有如“kill,die,buy,go,come,get married,leave,arrive",为了避免短暂性动词和一段时间连用,我们就要试着把短暂性动词转换成和他有相同意义的延续性动词,如have left for 2years走了两年,可以改为have been away,同理join加入,不久等同于 in（延续性）嘛,明白了吗?

Lily with her parents_______ the Greener China since two yea Lily with her parents has been in the Greener China since th Lily with her parents______Oxfam since two years ago. Lily with her parents ______ Oxfam since two years ago. A．ha dongdong has__ Greener China for two months. Miss Smith with her parents _____（be)______China since 2 yea Lily,with her friend _｛chat｝under the tree和Lily with her fri lily with her classmate often___out in the supermarket on we Mr Smith with his parents ______ China since two years ago. 定冠词 the Greener China is an organization that protects the__ 填空：______ has Tom been a member of Greener China since he __ ______has Mr. White been a member of Greener China since he