Question

I'm afraid i can't get in all the wheat within such a short time___ to help me tomorrow.

a. unless you will come b. unless you come c. until you will come d. until you shall come 选那个?能解释一下这道题吗?解释一下四个答案..

Answer 1

选B,unless引导时间状语从句,不能用将来时.从上下文的句意看,动作是将来,即所谓的"主将从现".

除非你明天来帮我，否则恐怕我不能在这么短的时间内收割所有的小麦。

Answer 2

选B unless you come ，unless引导时间状语从句中的将来时用一般时态代替。而ACD都是这样的错误