what is your brother going to do after he finishes uviversity?为什么用finishes,而不用will finish.
问题描述：
what is your brother going to do after he finishes uviversity?为什么用finishes,而不用will finish.
答
因为be going to表将来 finishs是三单 这句话的意思是你的兄弟在完成了他的大学学业后要做什么？ 所以用一般现在时就可以了
答
when,if,after引导的句子叫从句，从句的动词一定不能用将来时，主句才可以用。
如：I will go with you, if you invite me.
答
前面有 going to do 是将来时 状语从句 主将从现