一般现在是表将来是可以的,比如说,有come,go,arrive,leave,start,begin,return等词,有明确时间规定的.如：The train leaves at six tomorrow morning.
或是用在主将从现的时间或条件状语的句子中.
可don't you somke 你不能把它看成将来时是吧,根据语境,完成时的使用,表示将来某个动作之前已完成.
Don't you smoke until the plane __ off.A takes b has taken 为
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