must,have to,have got to的区别都是必须的意思 有例句最好

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must,have to,have got to的区别都是必须的意思 有例句最好
must,have to,have got to的区别
都是必须的意思 有例句最好

must,have to,have got to的区别都是必须的意思 有例句最好
一、must的用法
1）表示主观的义务和必要,主要用于肯定句和疑问句,意思为“必须……,得……,要……”；由must引起的疑问句,肯定回答要用must或haveto,否定回答要用needn’t或don’thaveto,意思是“不必”；must的否定形式mustn’t表示禁止,意思是“不能,不许”.如：
Wemustfindagoodmethodtolearncomputerwell.
我们必须找一个学好电脑的方法.
—MustIfinishthetaskrightnow?
我现在必须完成这个工作吗?
—Yes,youmust./Yes,youhaveto.是的.
(—No,youneedn’t./No,youdon’thaveto.不,不必.)
Youmustn’tcomeherewithoutpermission.未经允许,你不能来这儿.
2）表示肯定的猜测,常用于肯定句中,意思为“一定是,必然……”.
注意must表示推断或猜测的几种情况:
Yoursistermustbeadoctorinthishospital.（现在的猜测）
你姐姐一定是这家医院的医生.
Hemustbereadingnewspapersinthereadingroomnow.
（正在进行的猜测）
他此刻一定正在阅览室读报.
Itmusthaverainedlastnight,forthegroundiswet.（过去的猜测）
昨晚一定下雨了,因为地面上是湿的.
二、haveto/havegotto的用法
1）must表示一种主观的需要,而haveto表示一种客观的需要,意思是“不得不”.如：
Ihavetoattendanimportantmeetingthisafternoon.
今天下午我不得不参加一个重要的会议.
Motherisout,soIhavetolookaftertheshop.
妈妈不在家,因此我不得不照看商店.
2）haveto的否定形式是don’thaveto,相当于needn’t.如：
Theydon’thavetobuyacomputeratpresent.
他们目前没有必要买电脑.
3）haveto与havegotto常可以互换.
三、巩固练习：
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项.
1.Mike,you______playwithfire.You______burnyourself.
A.won’t;can’tB.mustn’t;may
C.don’thaveto;mustD.havegotto;shouldn’t
2.You______seethedoctor,Joe.Youdon’tlookverywell.
A.mustB.shall
C.mayD.can
3.—MustIcleanthewindownow?
—No,you______.
A.mustn’tB.needn’t
C.can’tD.maynot
4.Jack’sill,sothey______changetheirplans.
A.mustB.should
C.havegottoD.oughtto
5.Harryhasbeenreadingallday—he______betired.
A.shouldB.hasgotto
C.hastoD.must
Key1:1-5BABCD

以上解释正确，补充：
have got to比 have to在口语中更长用

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