'Must not have done' 强调的是“本不必做,但做了”,而 'must have not done'(这种表达在实际英语中并不常见,更常用的说法是 'couldn't have done' 或 'might not have done')则可能表达的是对过去行为的否定推测,即“可能没有做”。因此,在使用时需要特别注意区分这两...
mustn't 的意思是禁止 ,mustn't have done是错误的语法表达.如果想表达“本不应该做某事而做了”通常用shouldn't have done 但是有must have done ,表示对过去发生的事情的猜测 分析总结。 如果想表达本不应该做某事而做了通常用shouldnthavedone但是有musthavedone表示对过去发生的事情的猜测结果...
答案 没有must not have done,表示对过去事情肯定的推测用must have done,否定的推测只能用can't/couldn't have done.相关推荐 1must have done 否定是什么?没有must not have done?用什么? 反馈 收藏
相反,must not have done 则用于表达对过去事件的否定推测。例如,如果某个活动的参与者名单上没有你的名字,你可以说你“本不必参加那个活动”。这种用法表明,尽管你实际上参加了活动,但根据其他情况推断,你本不必参加。因此,理解 must have done 和 must not...have done 的用法,需要基于对句...
没有must not have done, 表示对过去事情肯定的推测用must have done,否定的推测只能用can't/couldn't have done.在反意疑问句中要根据具体的时态来定,如果句中有具体的过去时间状语的话就用did/didn't we,反之没有具体的过去时间状语,强调对现在影响时,就用完成时。例如:He must have ...
must 表推断时,有否定形式:mustn't have done 这种结构吗?I s aw him yesterday.He ( ) to Amertican.
没有must not have done, 表示对过去事情肯定的推测用must have done,否定的推测只能用can't/couldn't have done.
情态动词加上完成时的意思?could not have done must not have done should not have done would not have done 以及它们的用法? 答案 could+have+done(过去分词)表示本来可能做的事却没有做.eg:You could have phone me.你本可以给我打电话.must+have+done表示对过去发生事情的猜测.eg:You must have heard...
mustn't have done sth此种形式的确不存在,must have done sth“一定做过某事”的否定形式是can't/couldn't have done sth,意思是“不可能做过某事”。2. 推测只是一种语言现象的目的,即用某语法结构来表示说话人的推测;而虚拟语气则是一种语言现象的名称,用于说话人一种虚拟假设或礼貌委婉...
有must not have done这种搭配吗?must have done表推测,它的否定形式不是can't/couldn't have done sth吗?这里(53题)是什么意思,有这种用法?[疑问]#英语#