I must be the happiest woman on earth! 我一定是世界上最幸福的女人了。
No, he must be lying. 不,他一定在撒谎。
He must have mistaken my meaning. 他一定误会了我的意思。
4. should have done 的用法
should have done只用于谈论过去情况,主要有两个用法:一是用于推测过去已经发生的情况,二是用于指本该发生而实际上未发生的情况。如:
You should have told me so before. 你早就应该告诉我。
He should have arrived by now. 此时他本该到了。
Look at the time! We should have been at the theatre ten minutes ago. 瞧都什么时候了! 十分钟前我们就该到戏院了。
5. need have done 的用法
need have done结构主要用于否定句或疑问句,一般不用于肯定句。用于否定句时,表示本来不必做某事,但实际上却做了;用于疑问句时,用于询问某一过去动作的必要性。如:
You neednt have hurried. 你当时实在不必那么匆忙。
She neednt have come in person a letter would have been enough. 她本不必亲自来写封信来就足够了。
Need you have paid so much? 你当时真须要付那么多钱吗?
Need they have sold the farm? 他们那时非得把农场卖掉不可吗? 高中英语语法:情态动词的推测用法
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