问题补充:
We don know if it this weekend. If it , we will go on a trip.
A. rains; won’t rain
B. will rain; isn’t rain
C. rains; rains
D. will rain; doesn’t rain
答案:
A. rains; won’t rain
B. will rain; isn’t rain
C. rains; rains
(答案→)D. will rain; doesn’t rain
解析:第一空主要考查的if引导的宾语从句,从句的时态要根据自己本身的时态来决定,而第二空,主要考查的if 引导的条件状语从句,在if