题目内容
5.---There's somebody at the door.Who _____ it be?Is it the postman?---No,it _____ be him.It's just seven o'clock.It's too early.( )
| A. | may; can't | B. | will; won't | C. | may; mustn't | D. | must; may not |
分析 --有人敲门.它可能是谁?它是邮递员吗?
--不,不能是他.现在才七点钟.太早了.
解答 答案:A.考查情态动词.句意"--有人敲门.它可能是谁?它是邮递员吗?--不,不能是他.现在才七点钟.太早了.".第一个空,根据Is it the postman?它是邮递员吗?可知,表示猜测,用may也许,大概.第二个空,mustn't一定不可以怎么样.may not也许不(推测时不太有把握).can't 不可能(推测时很有把握).won't不将.根据It's just seven o'clock现在才七点.可知,表示有一定把握的推测,用can't.不能是他.答案是A.
点评 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语.否定形式通常在后面加not.要注意情态动词的不同用法.
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