can't have done,resent doing sth

couldnt have done 2023-10-16 14:42 599 墨鱼

couldnt have done

can't have done,resent doing sth

canhavedone与canthavedone的区别我们在学习英语一些语法时经常会遇到一些让人无法分辨的情况这个时候最好是用一些比较和类比的方法can have done与can't have done的区别can't have done的用法不只是一个助动词，在日常英语用法中，它更是一种独特的用法，可以表达一种假设或条件式的潜在意义。它常用在句子中以表示一种深层次的表达，即当某件事没

It must have rained last night. 昨晚肯定下雨了（过去）It must be Tom’s phone. 那一定是汤姆的手机（现在）Can’t/couldn’t 一定不对现在（can’t do/be）和过去（can’t ha2.情态动词can/could可用于否定句中，即can't have done/couldn't have done,表示对过去发生的事情或状态的肯定的推测，意为“过去不可能做过，肯定没做过",与musthavedone正好相反

这是情态动词表示对过去的推测的句型，“当时不可能做过”如He can't have eaten lunch.他当时不可能吃过午饭了.needn't have done表示过去本不必做但实际上却做了某事didn't need to do表示过去不必做而实际上也没做某事五、dare的用法1、dare用作情态动词，后面接动词

注意：can't have done 的语气比couldn't have done 要强一些。例如：He can't have been to that town. 他根本不可能去过那座城市。语气略强) The measurement couldn't have beecan't have done（不可能做过）是must have done（一定做过）的否定形式。couldn't have done(可能没做过)是may hav

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标签： resent doing sth