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
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 hav
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...
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) ...
must be 一定(对现在或将来事实肯定的推测)must have been 一定(对过去事实肯定的推测)must 一词没...
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 havehave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 be ill.他...
解析 must be不一定是系动词,后面加doing是现在进行时. must have been 本身可以是现在完成时,后面加doing是现在完成进行时 分析总结。 是不是可以理解为must为助动词而其后不论是be还是havebeen其本身的功能与时态并不受must的影响和改变仅仅是因为加了must而多了一层肯定性的推测意义...