题目内容
What ________ if there ______ no water or air on the earth?
A.happen, is | B.will happen, is |
C.will happen, will be | D.happen ,are |
B
解析试题分析:句意:如果地球上没有水和空气,将会发生什么?根据句意判断,句子要用一般将来时,water为不可数名词,并且if 引导的状语从句用一般现在时表示将来所以用单数is ,故选B
考点:if引导条件状语从句的时态
点评:此考点也是中学英语中最喜欢出现的考点,if除了可以引导条件状语从句外,还可以引导宾语从句,翻译成“是否”。引导宾语从句时没有“主将从现”的说法。除了if外,还有when, as soon as也一样要注意“主将从现”。
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