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700字范文 > I think he must be writing his essay at home now ?A. is heB. isn’t heC. do ID. mustn’t he

I think he must be writing his essay at home now ?A. is heB. isn’t heC. do ID. mustn’t he

时间:2019-10-08 01:48:01

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I think he must be writing his essay at home now  ?A. is heB. isn’t heC. do ID. mustn’t he

问题补充:

I think he must be writing his essay at home now, ?

A. is he

B. isn’t he

C. do I

D. mustn’t he

答案:

A. is he

(答案→)B. isn’t he

C. do I

D. mustn’t he

解析:考查反意问句:陈述部分是“I think/suppose/believe + 宾语从句”时,简略疑问部分应和从句相一致,但须注意否定前移的现象。这句话是和从句一致,从句中的must是表示推测,must表示“一定、肯定”等推测意义时,疑问部分一般不用情态动词,而和must后的动词相一致。这句话就是和be动词一致,因为前面是肯定,后面用否定,isn’t he?选B。

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