都不对,首先没有first time + doing sth这种固定搭配
应该用It[This] is the first time＋ that ,that 从句通常用现在完成时
is this the first time that you have taught here?
is this your first time teaching here.is this your first time that you teach here.哪句对?为什么谢
is this your first time teaching here.is this your first time that you teach here.哪句对?为什么谢
英语人气：788 ℃时间：2019-08-20 17:35:55
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