八年级英语下学期unit17renision.ppt

八年级英语下学期unit17renision8.认为对某人来说做某事有必要：9.候诊室10.等医生来；11.在队伍的前面：12.她的膝盖伤的很厉害：13.抓住她的胳膊：14.嘲笑那个妇女的错误：think it necessary for us to doa doctors waiting roomwait for the doctor to comeat the head of the queueher knees hurt badlytake her armlaugh at the womans mistake 1 must 1,1,必须，应当（警告）必须，应当（警告）必须，应当（警告）必须，应当（警告）e.g:I must go home at 8:00/You must be more careful!e.g:I must go home at 8:00/You must be more careful!2,2,一定，肯定（猜测，可能性很大）一定，肯定（猜测，可能性很大）一定，肯定（猜测，可能性很大）一定，肯定（猜测，可能性很大）e.g e.g；He is not at home.He must go out for a walk.He is not at home.He must go out for a walk.I dont feel well,I must be ill I dont feel well,I must be ill。2 mustnt=must not 不准，不允许不准，不允许(禁止）禁止）You mustnt cross the road now./You mustnt talk in classYou mustnt cross the road now./You mustnt talk in class 3 must 的疑问句的疑问句 Must I finish my homework now?Must I finish my homework now?Yes,you Yes,you must./No,you./No,you needntMust/mustntYou mustnt eat anything until you see the doctor.（直到（直到为止）为止）你看医生之前，什么东西都不可以吃。你看医生之前，什么东西都不可以吃。=You mustnt eat anything before you see the doctor.你们不来，我们不会出发。你们不来，我们不会出发。在汤姆回来前，我不会告诉你的。在汤姆回来前，我不会告诉你的。没洗手前，别吃东西没洗手前，别吃东西。We wont start until you come.I wont tell you until Tom comes back.Dont eat until you wash your hands.If I get to Beijing,I _(call)you.If the light is yellow,we _.If the light is red,we _.should wait must stop if if 引导引导条件状语从句条件状语从句 （如果）（如果）主句用将来时态，则从句用一般现在时态主句用将来时态，则从句用一般现在时态,也可也可以是以是can/must/shallcan/must/shall等情态动词等情态动词+动词原形动词原形will callwhen,before,afterwhen,before,after，as soon as,as soon as,notuntil notuntil 等引导等引导时间件状语从句时间件状语从句如果主句用一般过去时态，从句也用一般过去时态，如果主句用一般过去时态，从句也用一般过去时态，如果从句用一般现在时态，则主句用将来时态。如果从句用一般现在时态，则主句用将来时态。My brother _(study)before he went to the army.When she gets on the bus,she _(cry).They _(not go)out until they finish the work.Jim will call his mother as soon as he _(get)here.Ater I woke up,I _(find)everyone looking at me.beforeWhen untilas soon asAfterstudiedwill crywont gogetsfound Fill in the blanks with must or mustnt.1 You look carefully before you cross the road.2 You play games in the street.3 You ride a bike in heavy traffic.mustnt mustntAB Fill in the blanks with if,when,before or after.must1 I went out for a walk I had supper.2 We talked happily Mr.Li came in.3 it rains tomorrow,they wont go out.afterwhenIf1,May I come a little later?(作否定回答）作否定回答）2,Must I go to school at once?否定回答否定回答3,I am free.I visit my old friend.(用用if连接两句）连接两句）4,I washed some clothes.I went to the cinema.(用用before和和after连接两句）连接两句）5，我可以走了吗？不，我可以走了吗？不，你必须留下。你必须留下。6，我们必须按时完成作业。，我们必须按时完成作业。7，我们不应该浪费时间。，我们不应该浪费时间。No,you cant.No,you neednt.If Im free,Ill visit my old friend.After I washed some clothes,I went to the cinema.I washed some clothes before I went to the cinema.May I go now?No,you must stay here.We must finish our homework on time.We mustnt waste time.Complete the sentences.Pay attention to the tenses.1.I _ you know when Bill _ me.(let,call)2.It _ raining when we _ the hotel.(start,leave)3.When he _ Helen,he _ her about the news.(see,tell)4.What _ he _ when he _ up?(do,grow)5.I _ and asked them if they _ Bobs address.(call,have)will letcallsstartedleftsees/sawwill tell/toldwill/isdo/going to docalledhadgrows6.If it _ a little warmer,we _ for a swim.(be,go)7.Maria _ you some money if she _ to the bank.(get,go)8.If she _ hard,Jill _ the exam.(work,pass)9.You _ sick if you _ too much food.(be,eat)10.I _ to the theatre after I _ my work.(go,finish)iswill gowill get goesworkswill passwill beeatwill go finishthink/find it necessary(for sb.)to do sth1.Do you think it necessary _(learn)English well?2.He found it exciting _(drive)in the busy street.3.Do you think it good for us _(learn)to wait?4.Do you think it possible _(finish)the work?stop doing/to doto learnto finish1.Look at the sign on the wall!Stop _(take)photos.2.Dont stop _(sing).We want to listen more.3.Stop _(work).You have finished too much.4.After a days working,I stopped _(have)a rest.5.When the teacher came in,everyone stopped _(read)books loudly.to learnto learnto havetakingsingingworkingto readstop from doing sth.Its better to do sth1.Its better_(do)sports everyday.2.Its interesting _(play)games.3.Its necessary _(drink)3 glasses of water.Its ones turn to do sthwait for ones turn to do sthwait in line to do sth/for sth1.Its Jims turn_(clean)the room.2.Everyone should wait for their turn_(get)on the bus.3.At the cinema,people always wait in _(buy)the tickets.to doto playto drinkto drinkto getto buy1.make a mistake3.mistake for (mistook)I mistook the girl for her sister.mistake2.take sth.by mistakeI took your book by mistake.You made a mistake in your homework.He made too many mistakes.2.Why are you still in bed?你怎么还在床上？(in bed )睡觉，卧床睡觉，卧床3.get ready for school 准备去上学准备去上学(get ready for 准备做某事）准备做某事）准备去睡觉准备去睡觉准备吃晚饭准备吃晚饭get ready for bedget ready for supper/dinner1.wait in line 排队等候排队等候=stand in a queue=stand in line jump the queue 不按次序排队或插队不按次序排队或插队Keypointsenjoy oneself/have a good time/have a lot of fun 玩得高兴，过得愉快玩得高兴，过得愉快 They had a lot of fun at the party.They enjoyed themselves at the party.They had a good time at the party.(1)to ones surprise To my surprise he still talks in class.(2)be surprised to do/that He was surprised to see this.He was surprised that the girl was blind.surprise.1.It is_(good)to wait here.Its too dark outside now.2.The_(doctor)waiting room is always full of patients.3.He fell off his bike and his legs hurt_.(bad)4.He was the first in the queue,so he stand_(near)to the door of the bus.5.When the woman found his son had some bad fish,she took him to the hospital_-_.(quick)7.Dont be a queue_(jump)8.Its raining_(heavy)now.better doctors badlynearestquicklyjumperheavily9.They enjoyed_(they)at the party.10.If you jump the queue,other people will not be _ (please)11.Please look carefully before you _(cross)the street.12.Im the first_(arrive)here.13.I _(go)with him if he _(start)tomorrow.14.You have to wait him _(help)you.15.Please tell her about it when she_(come).16.He didnt tell me anything until he_.(leave)17.Look!On the desk_two storybooks.18.Do you think it necessary to learn _(wait)?themselvespleasedcross to arrive will gostartsto helpcomesleftare to wait1.过马路之前，要左右看看。2.如果你不小心，车会撞到你的。3.当绿灯亮时，过马路才安全。Before you walk across the street,you must_ _ _._ you arent _,a car may _you.It is _ to _ the road when the _are greenlookleft and rightIfcarefulhitsafecrosslights4.不要嘲笑那个小男孩。5.上车的时候，不要拥挤。6.过马路时，你必须先环顾四周。7.Who is _ _ _ the line?（在的前头）When you _ _ the bus,you mustnt _ others.You _ _ _first _ you _the road_ _ _ that boy.Dont laugh atgot onpushmust look aroundwhencrossat the head8.When the light are red,_ _ _ _（车必须停下来）9.小心！那辆小车差点撞到你。10.When you buy something.You must_ _ _ _（等着轮到你）_ _!The car nearly _ you.The car muststopBe carefulhitwait foryour turn