He________sleep，although he tried to，when he got on such a hunt for an idea unti
题型：不详难度：来源：
He________sleep，although he tried to，when he got on such a hunt for an idea until he had caught it. (2013·湖南，32)| A．wouldn’t | B．shouldn’t | | C．couldn’t | D．mustn’t |
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答案
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解析
C
解析 考查情态动词的辨析。wouldn’t不会；shouldn’t不应该；couldn’t不能；mustn’t禁止。根据语境可知，他显然是“不能”入睡，根据句中的although he tried to可知这里说的是过去的事情，所以用cannot的过去式。 |
举一反三
When I was a child，I ________ watch TV whenever I wanted to. (2013·江西，29)| A．should | B．could | | C．must | D．need |
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I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house. (2012·新课标全国，30)| A．couldn’t | B．mustn’t | | C．shouldn’t | D．needn’t |
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—God！My cell phone is missing.
—You ________ have left it at home.I heard you telephone our daughter in the bathroom.| A．shall | B．must | | C．would | D．could |
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—You ________ any because we still have plenty at home.| A．should have bought | | B．could have bought | | C．needn’t have bought | | D．mustn’t have bought |
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