1、,基本 形式,Must Have to,基本 意义,特殊 用法,表示 推测,巩固 练习,Must have to 肯定式 must do have/has/had to do 否定式 must not do dont/doesnt/didnt have to do neednt/dont have to 疑问式 Must + sb. + do ? Do/does/did + sb. + have to?,由must引起的疑问句，肯定回答要用must或have to, 否定回答要用neednt或dont have to, 意思是“不必”.Must I finish the task right
2、now?Yes, you must. / Yes, you have to. No, you neednt. / No, you dont have to. Mustnt 表示禁止，意思是“不准”,Must 和have to 的区别：I must learn another language. I have to learn another language. Tom must shave every morning. Tom has to shave every morning. 妈妈不在家，因此我不得不照看商店。 Mother is out, so I have to look after
3、 the shop. 我要留下来照看店。 I must look after the shop. 你留下看店。 You must look after the shop.,(主观愿望：I want to),(客观需要：我跳槽去了法资企业。),( 军人服从命令),( 他长着一脸大黑胡子),必须,不得不,Must 表示猜测，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:你姐姐一定是这家医院的医生。 （表现在的猜测）Your sister must be a doctor in this hospital. 他此刻一定正在阅览室读报。 （表正在进行的猜测）He
4、must be reading newspapers in the reading room now.昨晚一定下雨了，因为地面上是湿的。（表过去的猜测）It must have rained last night, for the ground is wet. Have to 不能表推测,must + be doing,must + do,must + have done,Consolidation,A,B,B,4. Jacks ill, so they _ change their plans. A. must B. need C. have got to D. might 5. -Harr
5、y has been reading all day .He _ be tired. A. should B. has got to C. has to D. must,C,D,2005 广东 2. Ive taken someone elses green sweater by mistake.-It _ Harrys. He always wears green. A. might be B. will be C. must be D. has to be 2004 天津 1. Who is the girl standing over there?-Well, if you _ know
6、, her name is Mabel. A. may B. can C. must D. shall,A,C,Must 表“偏要，偏偏”： After I gave him advice, he must do the opposite. If you must leave, tell me and I will let you go. Must you trouble me now?,Policeman:_. The man:_. ,You must hand in your homework on time.,Im sorry. My mother was ill yesterday,
7、so I had to send her to hospital,He must have done something wrong.,反意疑问形式 当陈述部分含有情态动词must时，我们便要分析一下 must的含义。 1.如果must 作“一定；要；必须”讲，反意疑问句须用neednt： He must work hard at physics, neednt he? 2.而当must作推测意义“一定是；必定”讲时，反意疑问 句则需根据must后的动词原形，选用相应的形式。 Tom must be at home，isnt he? Tom must have finished his homework, hasnt he?,Notes：must 用作名词,必须有的/做的东西 Warm clothes are a must in the mountains. Must I listen to the teacher in class? Yup, you must. Thats a must.,
