英语各组单词的区别 1、must be &must have been 2、can't be &can't have been 3、may be &may have been 这三组词语有什么区别? 一一说清楚 相关知识点: 试题来源: 解析 1.前者表示肯定怎么样,对现在的肯定推测;后者表示肯定已经怎么样,对过去的肯定推测 . 2.前者表示不可能怎么样,对现在的...
百度试题 结果1 题目must be的用法和must have been的用法是什么?相关知识点: 试题来源: 解析 must be表示猜测 只是可能性很大很大 must have been 表示对过去的猜测,意思是:过去一定干了什么 但也是说话人的主观猜测 只是可能性很大 反馈 收藏
must have been和must be的区别在have。因为本句是指对过去情况的推测，所以必须要用“情态动词+动词的完成式”。have在这里表示是动作已经完成。所以must have been是对过去的事实的肯定猜测，must be是对现在事实的肯定猜测。例句：Sorry I made such a fool of myself last night. I must have ...
简单地说:对过去情况作推测,用must have been;所对现在情况作推测,用must be。 比较: He must be ill. 他一定是病了。(指现在有病) He must have been ill. 他当时一定是有病 / 他一定生过病。(指过去有病) He must be very rich.他一定非常富有。(指现在有钱) He must have been very rich.他...
must have been 和 must be的区别在 have have在这里表示是 动作已经完成。所以 must have been是对过去的事实的肯定猜测 must be是对现在事实的肯定猜测 e.g.She sings so well.I think she must have been a singer.她唱得真好。我想她以前肯定是名歌手。he doesn't come to school today....
must have been 和 must be的区别在 have have在这里表示是 动作已经完成.所以 must have been是对过去的事实的肯定猜测 must be是对现在事实的肯定猜测 e.g. She sings so well.I think she must have been a singer. 她唱得真好.我想她以前肯定是名歌手. he doesn't come to school today.He must ...
简单地说:对过去情况作推测,用must have been;所对现在情况作推测,用must be.比较:He must be ill. 他一定是病了.(指现在有病)He must have been ill. 他当时一定是有病 / 他一定生过病.(指过去有病)He must be very rich. 他一定非常富有.(指现在有钱)He must have been very rich. 他当时一定...
不可以互换 两者有时态上的区别 第一个在推测的时候，动作还未发生（对现在进行推测）第二个在推测的时候，动作已经发生（对过去进行推测）There must be some mistake. 这儿一定是有些错误（对现在的事实进行推测）There must have been some mistake. 当时这儿一定弄错了（对过去的事实进行推测）这...
must have been 和 must be的区别在 havehave在这里表示手亏是 动作已经完成。所以must have been是对过去的事实的肯定猜测must be是对现在事实的肯洞改定猜测e.g.She sings so well.I think she must have been a singer.她唱得真好。我想她以前肯定是名歌手。he doesn't come to school today. He mus...
你对must be和must have been用法的理解是对的，但“总是分不清”，说明掌握不透彻，不能灵活运用。