题目内容
16.We'll go on a field trip if it _______ this weekend.( )| A. | won't rain | B. | isn't raining | C. | doesn't rain |
分析 如果这个周末不下雨,我们就去郊游.
解答 答案:C.考查否定句.句意"如果这个周末不下雨,我们就去郊游.".A一般将来时态.B现在进行时态.C一般现在时态.原句是if引导的条件状语从句,通常遵循主将从现的时态形式,因此从句用一般现在时态,主语是it,含有实义动词,变否定句在实义动词前用助动词doesn't.答案是C.
点评 考查否定句.通常是在be动词,情态动词后加not.一般现在时态,主语不是第三人称单数用don't,主语是第三人称单数用doesn't.一般过去时态用didn't.还有其它用法需要牢记.
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