题目内容
8.You ______ touch the chemical,or you ______ get burnt.( )A. | may not; will | B. | mustn't; will | ||
C. | may not; would | D. | shouldn't; should |
分析 你一定不要触碰这种化学药品,否则你会被烧伤.
解答 答案:B.根据touch the chemical表示"触碰这种化学药品",get burnt表示"被烧伤"可知第一个空用mustn't表示"禁止,一定不要",第二个空用will表示"将会".所以选择B.其他选项中的情态动词中may not表示"可能不";shouldn't表示"不应该".
点评 考查情态动词的用法.
must是情态动词,没有人称或数的变化,后接动词原形,其主要用法如下:
1.表示义务或必要性,意思是"应该、必须",通常用于肯定句及疑问句.如:
You must go to bed now.你现在必须睡觉了.
Must I start at once?我必须立刻出发吗?
2.must的否定式是must not/mustn't,意思是"不应该、禁止",语气较强烈.如:
You must not smoke here.你不许在这里吸烟.
We mustn't be late again.我们不应该再迟到了.
3.由must引出的一般疑问句,肯定回答用must,否定回答用needn't,don't need to或don't have to均可,但不用mustn't,因为mustn't表示"不许、禁止"的意思,与问句的原意不符
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