反意疑问句 试题 It must have snowed last night,_____? | ||||
内容: | It must have snowed last night,_____? A.hasn't it B.didn't it C.wasn't it D.mustn't it | |||
主题: | must | |||
内容: | 分析:本句中must的意思是:肯定。must表示推测。此时后面的反义问句不用must构成,而是根据must后的助动词来构成。本句中由于有last night,所以用表示过去的助动词did来构成,选B. | |||
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