题目内容
7.Our house is on the top of the hill,and in winter the winds ________ be very cold.( )A. | can | B. | need | C. | would | D. | shall |
分析 我们的房子位于山顶上.在冬天,风会非常寒冷.
解答 答案A.
can 有时也用于肯定句中表示推测,表示理论上的可能性,即从理论上或逻辑上分析是可能的,但实际未必会发生;need 需要,不能表示推测;would 总是,表示将来;shall 应该,用于第二人称和第三人称,表示命令、警告、允诺、威胁、规定等.根据句子所表达的意思可知此处考察的是表示"推测"的情况,故答案选A.
点评 本题考查情态动词的用法.can表推测时通常只用于否定句和疑问句,一般不用于肯定句.注意,can 有时也用于肯定句中表示推测,这主要见于以下情形:(1)表示理论上的可能性,即从理论上或逻辑上分析是可能的,但实际未必会发生.如:Strikes can happen at any time.罢工随时都可能发生.Even an experienced climber can get into trouble.那怕是个有经验的登山者也可能陷入困境.(2)后接"be,get,seem,become+形容词",表示"有时会""时常会"等义.如:Canoeing can be a lot of fun.划独木舟有时会非常有意思.When he's roused he can get very angry.要是惹着了他,他有时大发脾气.(3)与only,hardly,never等表示限制或否定意思的词语连用时,can也可用于肯定句中.如:A:Who's that at the door?门外是谁呀?B:It can only be the postman.只能是邮递员.(can only与must相似)

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