摘要:所谓定句型.就是分析所给句子的句型特点.再选用具有特定句型特点的情态动词.例1: Peter _______come with us tonight.but he isn't very sure. A.must B.may C.can D.will 析:选B.根据语境.彼得拿不定主意是否来.说明他可能会来而不是一定会来.所以.A为错误答案.may和can都可表推测.意为“可能.或许 .但can通常用于否定句和疑问句.所以此句只能用may. 例2: -Need I go there with you? -Yes.you____.You have to go with me at once. A.need B.must C.will D.can 析:选B.need作为情态动词时用于否定句和疑问句中.其一般疑问句的肯定陈述句回答应用must. 例3:He ____there alone.but I dare not. A.dare go B.dares to go C.dare going D.dares to be going 析:选B.dare作为情态动词只能用于疑问句.否定句.条件状语从句.表怀疑的名词性从句.简单的肯定答句中.该句为肯定句.所以A为错误答案.答案B中的dare作为实义动词适用于任何句型.

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