1、情态动词情态动词复习can学习maymight学习must/need 表示推测的用法 CONTENT复习复习 情态动词情态动词 can can第第 一一 部部 分分He He cancan run.run.They They cancan _,_,but theybut they _play tennis.tennis.play basketballbasketball cantcant意为：“能；会”表示能力(体力，知识、技能)1.1.情态动词情态动词+V+V原形原形=谓语动词谓语动词He He cancan run.run.They They cancan play basketball,
2、but theybasketball,but they cant cant play tennis.tennis.2.2.情态动词情态动词无无人称和数的变化人称和数的变化3.3.情态动词情态动词的的否定否定是在情态动词后是在情态动词后加加 not not 2.I can not play basketball.3.I need buy/bought a computer.4.She can/cans ride a horse.1.I can play/played basketball.may 可能；可以可能；可以can 能；可以能；可以must 必须；一定必须；一定need 需要需要 +V.
3、()原形原形may not 可能不可能不cant 不可能；不可以不可能；不可以mustnt 禁止禁止neednt 不需要；不必不需要；不必 (能能)表示能力表示能力 He can speak English.表示表示猜测猜测-100%否定否定 Can I help you?表示表示请求或允许请求或允许 -Look at woman at the gate!Its our teacher.-That cant be our teacher,because she went to Shanghai yesterday.can not=cant 不会；不会；不可能不可能can-could 表请求时
4、could语气更委婉，主要用于语气更委婉，主要用于疑问句，答语应用答语应用can.Could I come to see you tomorrow?Yes,you can.1.Who is the man over there?1.Who is the man over there?Is it Mr Li?Is it Mr Li?No,it _ be him.Mr Li is No,it _ be him.Mr Li is much taller.much taller.A.mustnt B.may not A.mustnt B.may not C.cant D.needntC.cant D.
5、neednt2.You _ go and ask Meimei.2.You _ go and ask Meimei.She _ know the answer.She _ know the answer.A.must;can B.must;may A.must;can B.must;may C.need;can D.can;mayC.need;can D.can;may3._you pass me a pen?Id like to 3._you pass me a pen?Id like to write down the telephone number.write down the tel
6、ephone number.A.Need B.Could A.Need B.Could C.Must D.Should C.Must D.Should情态动词之情态动词之may mightmay might第第 二二 部部 分分1.1.表示请求或允许表示请求或允许:maymayMay I go home，please?mustnt/you cant.以以may（表许可或请求）开头的一（表许可或请求）开头的一般疑问句般疑问句,肯定回答用肯定回答用may，否定回，否定回答用答用mustnt或或cant.May I borrow the book？我可以借这本书吗？我可以借这本书吗？Yes,you
7、may.No,you _ May I use your pen for a while?我能用用你的钢笔吗？我能用用你的钢笔吗？canmaymay not“可能不可能不”。(可以可以)may-might语气较为婉转客气语气较为婉转客气1.1.表示请求或允许表示请求或允许:maymayMay I go home，please?2.2.表示希望、祝愿表示希望、祝愿。3.3.表示猜测（可能）表示猜测（可能）:No,you _ Yes,you may.mustnt/you cant.以以may（表许可或请求）开头的一（表许可或请求）开头的一般疑问句般疑问句,肯定回答用肯定回答用may，否定回，否定回答
8、用答用mustnt或或cant.maycanMay you be happy！祝你幸福！祝你幸福！(可以可以)下周她可能到上海去。下周她可能到上海去。你可能是对的你可能是对的。他明天也许会（不会）来这儿。他明天也许会（不会）来这儿。He may（may not）come here tomorrow.may-might语气较为婉转客气语气较为婉转客气may not“可能不可能不”。may-might语气更加不肯定。语气更加不肯定。You may/might be right.She may/might go to Shanghai next week.maybe adv.possible adj
9、.probably adv.Maybe I will go with them.也许我会和他们一起去。也许我会和他们一起去。It is possible to get to the airport before seven.七点前可能到达机场。七点前可能到达机场。It is possible that I tell him the wrong time.可能我告诉了他错误的时间。可能我告诉了他错误的时间。一般用于句首一般用于句首It is possible to do sth.做某事是可能的做某事是可能的 It will probably be.可能性在这几个词中最大可能性在这几个词中最大 I
10、t is possible+that从句从句 may probably.1.It be cold and wet in Hong Kong in January.2.Mary will go to New York in the autumn.3.It will rain tomorrow,so I will stay at home and read a book.4.You _ need to take a scarf with you.It is cold.5.It rain later,so take an umbrella with you.6.It will be sunny in
11、 Haikou tomorrow.mayprobablyprobablyprobably/maymayprobably情态动词之情态动词之m mustust第第 三三 部部 分分0102表示命令表示命令“必须必须”(必须必须)You must come early tomorrow must not=mustnt 不许；禁止一般疑问句的回答一般疑问句的回答-Must you come early tomorrow?-Yes,you must.-No,you neednt/dont have to.03表示猜测：表示猜测：100%肯定，肯定，“一定；肯定一定；肯定”They must be at
12、 home.The light is on.We must follow the traffic rules.You _be late for school.must?mustnt?mustntYou _listen to your teacher carefully.must1.-_I do the laundry first?No,you_.You can do your homework first.A.Must;mustnt B.Can;mustnt C.Must;neednt D.May;neednt2.You _ be quiet when you are in a library
13、.A.may B.can C.will D.must3.3.-Must I finish all the work before I leave?-Yes,you _.”A.must B.can C.mustnt D.needntmust must 必须必须have to have to 必须必须We We mustmust study hard to study hard to find a good job.find a good job.表示主观因素表示主观因素My sister is ill,so I My sister is ill,so I have tohave to stay
14、at home to stay at home to look after helook after her.r.不得不/被迫表示客观因素表示客观因素侧重点不同时态形式不同否定式的结构和意义不同musthave tomust只有一个形态；have to有多有多种时态。种时态。mustnt 禁止；不允许have to的否定为dont have to 不必=neednt.侧重于主观看法，认为有必要或有意义去做某事；侧重于客观需要，含有“不得不、被迫”之意。You dont have to tell him about it.You mustnt tell him about it.你不一定要把此事
15、告诉他。你不得把这件事告诉他。You may not smoke hereYou cant smoke here You mustnt smoke here 情态动词之情态动词之needneed第第 四四 部部 分分01作情态动词 “需要需要”，通常用在否定句或疑，通常用在否定句或疑问句中。问句中。needntneednt uy a big houseuy a big house.You You need toneed to take a camera with you.take a camera with you.02作行为动词 “need to do sth.需要做某事(需要需要)Need
16、 Need I buy a big house?I buy a big house?-Yes,-Yes,youyou must must.-No,you-No,you neednt/dont have to.(neednt/dont have to.(不必要不必要)had better do sthhad better do sth第第 五五 部部 分分EgEg：你最好去看医生。你最好去看医生。You had better go to You had better go to see a doctor.see a doctor.你最好别待在这儿。你最好别待在这儿。Youd better not
17、 stay Youd better not stay here.here.(最好最好)had better do sth had better do sth 最好最好had better had better notnot do sthdo sth1.It rained heavily,so we _ stay at home watching TV all day.A.could B.had to C.must2.May I take the book out of the reading room?No,you cant.You _ read it here.Its the rule.A.
18、must B.would C.may 3.Dad,may I watch TV?No.You _ finish your homework first.A.must B.can C.may 4.Bob,shall we go and meet our new classmate?Sorry.Im busy now.But you _ ask David to go with you.Aneed Bmay Cmust5.Could I borrow your dictionary?Yes,of course you _.A.might B.will C.can D.should6.You _ r
19、eturn the book now.You can keep it till next week if you like.A.cant B.mustnt C.neednt D.may notC C 7.Jake,you _ play with the knife,you _ hurt yourself.A.wont;cant B.mustnt;may C.shouldnt;must D.cant;shouldntB 8.-Will you stay for lunch?-Sorry,_.My brother is coming to see me.A.I mustnt B.I cant C.
20、I neednt D.I wontB 9.-May I pick a flower in the garden?-_.A.No,you neednt B.Not,please.C.No,you mustnt D.No,you wont10.There is someone knocking at the door.it be Tom?A.can B.must C.should D.ought to感感 谢谢 大大 家家 的的 观观 看看Just for today I will try to live through this day only and not tackle my whole life problem at once.Just for today I will try to live through this day only and not tackle my whole life problem at once.
