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must have been和must be的区别
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推荐答案 推荐于2017-09-08
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 be ill.
他今天没有来上学,肯定是病了。
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第1个回答 2013-04-05
must be和must have been都表示推测,区别就是must be表示一般将来时和现在完成时的推测,must have been表示过去式的推测,所以我建议大家不要记混
第2个回答 2009-11-21
must have been“(过去)肯定是”
must be“肯定/一定是”
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答:
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....
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