题目内容
19.I don't know if his uncle ________.I think he will come if it _______rain.( )| A. | will come; doesn't | B. | comes; won't | ||
| C. | will come; won't | D. | comes; doesn't |
分析 我不知道他的叔叔是否会来,我想如果不下雨他会来.
解答 答案:A.第一个if引导的宾语从句,主句是一般现在时,从句时态不受限制,表达的是将来的事情用一般将来时will+动词原形,第二个if引导的条件状语从句,遵循主将从现的规则,从句主语it,故does,故答案是A.
点评 1. if从句用一般现在时,主句用一般将来时
If he runs he'll get there in time.如果他用跑的,他就会及时赶到那儿. The cat will scratch you if you pull her tail.如果你拉猫的尾巴,它就会抓你.
2..if从句用一般现在时,主句用情态动词
If the fog gets thicker the plane may/might be diverted.如果雾在大一些,飞机可能就会改在别的机场降落.
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