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1、Unit 9 Section A Period 2(3a-3c)A:Can you come to my birthday party?B:Sure,Id love to.birthday partyA:Can you go to the concert?B:Im sorry,I cant.I have to prepare for an exam.go to the concertprepare for an examA:Can you go to the movies?B:Im sorry,I cant.I have to go to the doctor.A:Can he go to t
2、he movies?B:No,he cant.He has to go to the doctor.go to moviesgo to the doctorA:Can you go to the zoo?B:Sorry,I cant.I have to help my parents.A:Can he go to the zoo?B:No,he cant.He has to help his parents.go to the zoohelp my parentsA:Can you play computer games with me?B:Sorry,I cant.I have to go
3、to the baseball game.A:Can he play computer games with me?B:No,he cant.He has to go to the baseball game.play computer gamesgo to the baseball gameA:Can you play soccer with me?B:Sorry,I cant.I have to watch TV.A:Can she play soccer?B:No,she cant.She has to watch TV.play soccerwatch TVAccept(接受接受)in
4、vitations:Sure/Yes/Of course,Id love to.Certainly,Id like to.Decline(拒绝拒绝)invitations:Im sorry,I cant.I have to look after my grandmother.I have to study for a math test.I am going shopping with my friend.Can you.?意意为为“你能你能吗吗？”，可用于，可用于邀邀请别请别人或委婉地人或委婉地请请求某人去做某事。其肯定求某人去做某事。其肯定回答常用回答常用 Sure,Id love/lik
5、e to.，否定回答常，否定回答常用用 Im sorry,I cant./Sorry,I cant.等。如：等。如：-Can you go to the baseball game?你能去参加棒球比你能去参加棒球比赛吗赛吗？-Im sorry,I cant.对对不起，我不能。不起，我不能。Explanation 单项填空单项填空 -Can you help me with my English this weekend?-Sorry,I _.I have a lot of homework to do.A.cant B.mustnt C.neednt D.dont答案：答案：A 题意：题意：“
6、请问这个周末你能帮我请问这个周末你能帮我学习英语吗？学习英语吗？”“对不起，我不能。我有对不起，我不能。我有很多作业要做很多作业要做”。不能答应他人的请求时。不能答应他人的请求时常用常用“(Im)Sorry,I cant.”。情态动词情态动词have to与其他的情态动词如与其他的情态动词如can、may、must和和should”不同。不同。（1）这）这4个情态动词没有人称的变化个情态动词没有人称的变化,而而have to有。它的第三人称单数为有。它的第三人称单数为“has to”。You/He should study hard.你你/他应该好好学习。他应该好好学习。He has to s
7、tudy hard.他不得不好好学习。他不得不好好学习。have to 的用法的用法（2）这）这4个情态动词在一般疑问句中将它们放在个情态动词在一般疑问句中将它们放在句首句首,在否定句中直接在他们后边加在否定句中直接在他们后边加not即可。即可。我们以我们以can为例为例:Can he go with us?他能和我们一起去吗？他能和我们一起去吗？He cant go with us.他不能和我们一起去。他不能和我们一起去。而而have to要加助动词要加助动词do,does或或 did 才才可能完成其疑问、否定句。可能完成其疑问、否定句。试将下面三种话分别写成试将下面三种话分别写成 （1）一
8、般疑问句，并作肯定回答。）一般疑问句，并作肯定回答。（2）否定句。）否定句。a.They have to go to the party.Do they have to go to the party?Yes,they do.They dont have to go to the party.b.He has to go to see the doctor.Does he have to go to see the doctor?Yes,he does.He doesnt have to go to see the doctor.c.She had to study for a math te
9、st yesterday.Did she have to study for a math yesterday?Yes,she did.She didnt have to study for a math yesterday.have to 与 must二者都有二者都有“必须必须”之意，但之意，但 have to 表示表示“客观上的需要客观上的需要”，有人称和时态的变化，有人称和时态的变化，否定形式为否定形式为 dont/doesnt/didnt have to(没没必要必要)；must 表示表示“主观上的要求主观上的要求”，无人称，无人称和时态的变化，否定回答一般用和时态的变化，否定回答一般
10、用 neednt 或或 dont have to(不必不必)。mustnt 表示表示“禁止禁止”。如：如：比一比比一比 We have to wear warm clothes in winter.冬天我们不得不穿上暖和的衣服。冬天我们不得不穿上暖和的衣服。(客观需客观需要要)I must finish my homework first before I watch TV.看电视前我必须先完成作业。看电视前我必须先完成作业。(主观要求主观要求)You dont have to tell him about it.你不一定要把此事告诉他。你不一定要把此事告诉他。You mustnt tell
11、him about it.你一定不要把这件事告诉他。你一定不要把这件事告诉他。Must I be home before eight oclock?8点之前我必须回家吗？点之前我必须回家吗？Yes,you must./No,you neednt./No,you dont have to.是的，必须回家。是的，必须回家。/不，不必。不，不必。Bob cant come out to play because he _ help Dad in the garden.A.can B.must C.has to D.have to答案：答案：C 题意：题意：鲍勃不能出来玩了，他得在花园里帮鲍勃不能出来
12、玩了，他得在花园里帮他爸爸。表示客观上的需要，应用他爸爸。表示客观上的需要，应用 have to；句子为一般现在时，主语为第三人称单数，句子为一般现在时，主语为第三人称单数，故选故选 C。即时练即时练(2008厦门中考厦门中考)-I cant give up smoking,doctor.-For your health,Im afraid you _.A.may B.can C.have to D.must【解析解析】选选C。may 意为意为“可能、或许可能、或许”，can 意为意为“能、会能、会”，have to 意为意为“必须、不得不必须、不得不”，表客观要求，而，表客观要求，而must
13、 表主观愿望。根据题表主观愿望。根据题意：为了健康，你必须戒烟，选意：为了健康，你必须戒烟，选C。【2010 四川达州四川达州】-Must I finish my homework right now?-No,you _.A.neednt B.may not C.mustnt D.cant【解析解析】must 在表示在表示“必须必须,应该应该”的时候，的时候，其疑问句的否定回答常用其疑问句的否定回答常用neednt 或或dont have to,表示表示“不必不必”，而不用，而不用must not。根。根据句意据句意must 在句中作在句中作“必须必须”讲，故答案选讲，故答案选A。watch
14、TVon the weekendmy cousinvisit grandparentsComplete the answers with might and one of the phrases in the box.3a1.A:What are you going to do on Saturday?B:Im not sure.I might _2.A:What are you planning to do after school?B:I dont know._visit my grandparentsI might watch TV.3.A:When will you finish th
15、e science homework?B:_4.A:Who are you going to the movies with?B:_5.Are you free to come to my place on Saturday?B:_watch TVon the weekendmy cousinvisit grandparentsI dont know.I might finish it on weekend.Im not sure.I might go with my cousin.Im not sure.I might have to practice the violin.3b Compl
16、ete the sentences below.Use the words in brackets to help you.1.Inviting:_(can/play tennis)Accepting:_2.Inviting:_(would like to/go to the movies)Refusing:_Reason:_(might have to)Can you play tennis on Saturday?Sure.That sounds great.Would you like to go to the movies on Friday?Sorry,I cant.I might
17、have to go out with my parents.3.Inviting:_(can/hang out with us tonight)Refusing:_Reason:_(must)4.Inviting:_(would like to/come to my birthday party)Accepting:_Can you hang out with us tonight?Sorry,Im not free.I must study for a test.Would you like to come to my birthday party?Sure.Id love to.invi
18、te v.邀请邀请 The man invited my father to go fishing with him this morning.这个男人今天上午邀请我爸爸和他一起去这个男人今天上午邀请我爸爸和他一起去钓鱼。钓鱼。根据句根据句可知可知“邀请某人干某事邀请某人干某事”为为invite sb.to do sth.。I invited him to my house yesterday.我昨天邀请他来我家。我昨天邀请他来我家。根据句根据句可知可知invite sb.to后也可跟名词。后也可跟名词。He will not come without your invitation.没有你的
19、请柬他是不会来的。没有你的请柬他是不会来的。根据句根据句可知可知invite 的名词是的名词是invitation。1.Mr.Green invited me _(visit)his factory last week.2.Thanks a lot for your _(invite).But I have to stay at home to do my homework.3.Thanks for_(invite)me to your party.to visitinvitationinviting即时练即时练He _ me to come to his birthday party the
20、 day before yesterday.A.invitation B.invite C.invited D.invites 典型例题典型例题答案：答案：选选C。解析：解析：句意为：前天他邀请我参加他的生日晚句意为：前天他邀请我参加他的生日晚会。（会。（1）invite sb.to do sth.“邀请某人做某邀请某人做某事事”是固定用法，由时间状语确定用一般过是固定用法，由时间状语确定用一般过去时，故选去时，故选C。（。（2）invite sb.to sp.意为意为“邀请某人到某处邀请某人到某处”。3cWrite down everything you have to do next we
21、ek.Choose a day and time to have a party.Then invite classmates to your party.A:Can you come to my party?B:When is it?A:Next week,on Thursday night.B:Im sorry.I have to study for a math test.MON.TUE.WED.THUR.FRI.SAT.SUN.REVIEWInvitation:Can you come to my party?Acceptation:Sure,Id love to.Yes,I d lo
22、ve to.Declination:Im sorry,I cant.I have to Id love to,but I have to 单项选择单项选择：1.Joe _ go to the doctor.His leg is broken.A.have to B.can C.has to D.may2.Can you help me with my English?Sure,_.A.Id like B.Id love C.Id love to D.I have to3.Thanks a lot for _ me _ your party.A.invite;for B.invite;to C.
23、inviting;for D.inviting;to 4.Sorry,Im busy today.I have _ homework to do.A.much too B.too much C.too many D.many too 句型句型转换转换：1.I have to study for a test this evening.(改改为为否定句否定句)I _ _ _ study for a test this evening.2.They can go to the concert.(改改为为一一般般疑疑问问句句)_ they _ to the concert?dont have toCan go3.Can Mary go to your birthday party?(作否定回答作否定回答)_,she _.Sorry/No cant 情景情景对话对话：1.-_ you go to the mall this week?-Sure,Id love _.2.-_ are you doing on Thursday afternoon?-I am going to the doctor.CanWhatto