求can't be/must be/can't have been/must have been的用法
求can't be/must be/can't have been/must have been的用法
He can't be……他不可能……He must be……他肯定是……He can't have been……他那时不可能……He must have been……他那是肯定是……这四个用法我一直很不明白,不知道哪种用在哪种句子里--------Why _____he_______(come) yesterday?--------He must _______(be) busy.因为这个题,把我苦恼了好久,不明白那四种句型的用法,做题时就不会了,希望有例句.好的加100分!
He can't be……他不可能……He must be……他肯定是……He can't have been……他那时不可能……He must have been……他那是肯定是……这四个用法我一直很不明白,不知道哪种用在哪种句子里--------Why _____he_______(come) yesterday?--------He must _______(be) busy.因为这个题,把我苦恼了好久,不明白那四种句型的用法,做题时就不会了,希望有例句.好的加100分!
赞 redpower2004 花朵
共回答了17个问题采纳率：70.6% 举报
1.He can't come.他不会来了.（不会/不可能）2.He must be ill.他肯定是病了3.he can't have been finished the work.他不可能已经完成了工作过去做过某事对现在产生影响的否定推测 既“不可能做过某事”------简单的说,对过去的否定推测 4.He must have been very tired.他肯定（已经）很累了.（表肯定推测）过去做过某事对现在产生影响的肯定推测 既“一定做过某事”------------对过去的肯定推测 题目：Why did he not come yesterday?为什么他昨天没有来?一个简单的疑问句He must have been (very) busy!他一定是很忙.---------对过去的肯定推测.
1年前
2
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你能帮帮他们吗