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    精英家教网 > 高中英语 > 题目详情
    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
    B　

    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。
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