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1、 基本基本(jbn)形式形式MustMustHave toHave to基本基本(jbn)意义意义特殊特殊(tsh)用法用法表示表示推测推测巩固巩固练习练习第一页，共6页。1.Must /have to 区别区别 I must learn another language. I have to learn another language. I must go now, or I will be late. Its too late. I have to take a taxi. 妈妈不在家，因此妈妈不在家，因此(ync)我不得不照看商店。我不得不照看商店。我要留下来照看店。我要留下来照看店。
2、你留下看店。你留下看店。(主观主观(zhgun)愿望愿望)(客观客观(kgun)必必要性要性)( 主观意愿主观意愿)( 客观必要性客观必要性)第二页，共6页。 Must have to肯定肯定(kndng)式式 must do have/has/had to do(人称和数人称和数变化变化)否定式否定式 must not do dont/doesnt/didnt have to do 疑问式疑问式 Must + sb. + do ? Do/does/did + sb. + have to? 由由must引起的疑问句，肯定回答要用引起的疑问句，肯定回答要用must.否定回答要用否定回答要用nee
3、dnt或或dont have to, 意思是意思是“不必不必(bb)”.Must I finish the task right now?Yes, you must.No, you neednt. / No, you dont have to. Mustnt 表示禁止，意思是表示禁止，意思是“不准不准”第三页，共6页。Must 表示猜测，常用于肯定句中，意思为表示猜测，常用于肯定句中，意思为 “一定是一定是, 必然必然”。注意注意must表示推断或猜测的几种情况表示推断或猜测的几种情况:你姐姐一定是这家医院的医生。你姐姐一定是这家医院的医生。 （表现在的（表现在的猜测）猜测）Your sist
4、er must be a doctor in this hospital. 他此刻一定正在阅览室读报。他此刻一定正在阅览室读报。 （表正在进行（表正在进行的猜测）的猜测）He must be reading newspapers in the reading room now.昨晚一定下雨了，因为地面昨晚一定下雨了，因为地面(dmin)上是湿的。上是湿的。（表过去的猜测）（表过去的猜测）It must have rained last night, for the ground is wet. Have to 不能表推测不能表推测must + be doingmust + domust + h
5、ave done第四页，共6页。1. Mike, you _ play with fire. You_ burn yourself.A. wont; cant B. mustnt; mayC. dont have to; must D. have got to; shouldnt2. You _ see the doctor, Joe. You dont look very well.A. must B. shall C. may D. can3. Must I clean the window now?No, you _.A. mustnt B. neednt C. cant D. may notConsolidationABB第五页，共6页。Consolidation4. Jacks ill, so they _ change their plans.A.must B. need C. have got to D. might5. -Harry has been reading all day . He _ be tired.A.should B. has got to C. has to D. mustCD第六页，共6页。
