You may leave the classroom when you __ writing.A.will finish B.are finishing C.have finished哪个对?

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You may leave the classroom when you __ writing.A.will finish B.are finishing C.have finished哪个对?

You may leave the classroom when you __ writing.A.will finish B.are finishing C.have finished哪个对?
You may leave the classroom when you __ writing.A.will finish B.are finishing C.have finished
哪个对?

You may leave the classroom when you __ writing.A.will finish B.are finishing C.have finished哪个对?
选c.时间状语从句和条件状语从句中,主句用将来时,从句用一般时态.所以不能选a,b,且finish是非延续性动词,不用于进行时,所以b就完全错误.只有c才是现在时态,这里也可以直接用finish.

我觉得这句应该用 finish , 这是个状语从句,“主将从现”。主句用一般将来、祈使句、情态动词,从句用现在。 当你写完时,你可以离开教室。

when从句,当你完成了写作的时候,你可能会离开教室。完成了,表示这个动作已经完成,也就是现在完成时,选C