求have to和must的异同,两者可以调换吗?比如I must get up early可以换成I have to

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求have to和must的异同,两者可以调换吗?比如I must get up early可以换成I have to get up early吗?
我可以看作是有原因的用have to,没有原因的用must吗?

must与have to的差别是：
must有点主观性,也就是说是主语想做的.
而have to是客观性,也就是说主语不想做,但也得做.译成：不得不
I must get up early.我必须早起.（我决定这样做）
否定：I needn't get up early.
I have to get up early.我不得不早起.（我不想这样做,但还是得这样做）
否定：I don't have to get up early.也可说I needn't get up early.（这两个意思基本相同了）

求have to和must的异同,两者可以调换吗?比如I must get up early可以换成I have to have to 和must 的区别是什么记住,一定要直观,比如是 I must还是have to do my homew I have to get up early next morning to _________ Do you have to finish it tiday?这里have to可以换成must或者need吗? You do not have to come everyday.这里have to可以换成must或者need吗? You must get up early to have e____ time to eat breakfast. 英语翻译you must get up early to have plenty of time to eat brea I hear you have to get up early every morning Must i ___the life up to the fifty floor.A.get B.take C.have You must have a good living habit,for example,get up early i must 和 have to 的异同?mustn't 和 don't have to 的异同? 请问must的一般疑问句的否定回答可以是：No,I don't have to