ask her to come and see me when she finishes her work.为什么finishe要用一般现在时,而不是别的时态

问题描述:

ask her to come and see me when she finishes her work.为什么finishe要用一般现在时,而不是别的时态

主句是祈使句时,时间状语从句用一般现在时.