题目内容
5.What are you going to do tomorrow?We'll go to the library tomorrow if it ______.( )| A. | isn't rain | B. | rain | C. | won't rain | D. | doesn't rain |
分析 你明天打算干什么?如果明天不下雨我们将去图书馆.
解答 答案:D
分析句子结构可知该句为含有条件状语从句的复合句,根据主句We'll go to the library tomorrow 是一般将来时,根据"主将从现"原则,if引导的条件状语从句用一般现在时,结合语境表达否定的意思,又知主语it是第三人称单数形式,谓语动词变否定句借助于助动词does,其结构为:doesn't+动词原形,故填doesn't rain,故选D
点评 本题考查状语从句,if引导的是条件状语从句,当主句是一般将来时态,从句应该用一般现在时态,我们称之为"主将从现".根据该原则即可对时态做出正确判断.
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