China （has joined ) the WTO and became a new member of it la

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/10/01 00:42:35

China （has joined ) the WTO and became a new member of it last year.
为什么这里用joined,join不是非延续性动词吗?就算用现在完成时,也该是has been in
对不起题目是China （has joined ) the WTO and became a new member of it

没有加since啊可以这么用啊在某个时间点加入了WTO 成为了新的会员.楼主说的是has been 多少年后面应该有since
因为since主句只能用延续系动词
希望能够帮到楼主

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