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情态动词 选择1•The lecture was a tall thin man with white ha

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情态动词 选择
1•The lecture was a tall thin man with white hair.
Then it ----Dr.Fell because he is short fat.It ---Dr.jones; he is thin.
A.can't be;must be
B.can't have been;must have been
为什么
不能选A答案是B
2 .Look at the clouds.It ----rain.
A.is going to
B.will
3.It's nearly seven o'clock,Jack----be here at any moment.
A.must
B.need
C.should
D.can
at any moment怎么翻译?
情态动词 选择1•The lecture was a tall thin man with white ha
1 、首先这个句子是发生在过去的,从was可以看出来.由此就可以排除A.另:情态动词 have done 表示对过去的推测.前者 不可能是……;后者 肯定是……
2 、二者皆表示将要,一般情况下可互换,wil主要指主观将要干什么,另外go rain
也可搭配短语下雨,go是瞬间性动词,现在分词表将要.例:I am coming.
3 、at any moment :在任何时候(时刻)随时.杰克随时都可能会来.表推测,
可能.选D