I didn’t know Headmaster Weng was away for Beijing. I to his office yeste
题型：不详难度：来源：
I didn’t know Headmaster Weng was away for Beijing. I to his office yesterday.| A．mustn’t have gone | B．needn’t have gone | | C．wouldn’t have gone | D．couldn’t have gone |
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答案
| B |
解析
试题分析：考查情态动词的完成式：A．mustn’t have gone 过去不可能做了…B．needn’t have gone过去本不必去而去了， C．wouldn’t have gone过去本不会做而做了，D．couldn’t have gone过去不可能做，句意是：我不知道王校长要了北京。昨天本不必去他办公室的。选B。
点评：情态动词的用法，要掌握每个情态动词的基本用法，其它的结构都是由其基本用法变化而来。情态动词+have done，一是表示推测，二是表示虚拟，要记牢。 |
举一反三
| Sir, a Mr. Wang is waiting for you at the gate. ________ he come in or stay there? |
--Life ____ be very hard for people living in the north of Canada as it is very
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—Yes, the weather there _____ be as low as 60℃ below zero.| A．must;can | B．shall;must | C．will;should | D．hasto;can |
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It be difficult to get a train ticket during traditional Chinese Spring Festival this year because there are many ticket windows.| A．mustn’t | B．ought to | C．needn’t | D．can’t |
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The boss ______ the worker how to do it, or the accident couldn’t have happened.| A．can’t have told | B．ought to tell | C．could have told | D．mustn’t have told |
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I have promised that my daughter _______ get a new electronic dictionary on her next birthday.| A．should | B．must | C．shall | D．would |
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