九年级英语rules and suggestions课件

Module 5 Rules and suggestions,Unit 1,You must keep to the path.,1Before we can enjoy ourselves on the Great Wall, there are afew rules and suggestions.在游览长城前，还有一些规定和建议。can 是情态动词，意为“能够”，表能力。如：He can speak Japanese.他会讲日语。,can 与 be able to,(1)can 表示过去或现在“能够”时，可以与 be able to 通用。如：He could/was able to run very fast when he was a boy. 他小时候,就能跑得很快。,(2)can 通常只用于一般现在时或一般过去时，而 be able to 可,用于各种时态。如：,He has not been able to come since he got hurt.自从受伤以后，他,就一直未能前来。,(3)在表猜测时，只能用 can，不能用 be able to。如：That cant be your bag.那不可能是你的书包。,Susan is good at English and she _ sing Englishsongs.(2010 年福建龙岩),Aneed,Bmay,Ccan,C,题意：苏珊擅长英语，而且她会唱英语歌。can 表示能,力，意为“能够”。,AcantCwont be able to,BcouldntDwasnt be able to,C,由时间状语“in two hours”可知谓语时态应用一般将来,时；can 和 be able to 都可以表示“能够”，但是 can 通常只用于一般现在时或一般过去时，故答案选 C。,The car breaks down, so we _ get there in two hours.,2You mustnt walk along the edge because you might fall andhurt yourself.禁止沿着边缘走，因为你可能会摔倒而伤着自己。,(1)mustnt 是情态动词 must 的否定形式，表示“禁止”。如：,Elevators mustnt be used when there is a fire.当火灾发生时，千万别搭乘电梯。,(2)might 也是情态动词，表示一种把握不大的猜测，意为,“可能”。如：,I dont know her.She might be the new neighbor.我不认识她，她可能是新邻居。,must 引导一般疑问句时，其肯定回答用“Yes, .must.”；否定回答用“No, .neednt./No, .dont/doesnt have to.” ，而不能用“No, .mustnt.”。如：,Must I finish the homework first?我必须先完成家庭作业吗？Yes, you must.是的，必须。,No, you neednt/dont have to.不，不必。,注意：have to 也表示“必须”，但强调的是客观上“不得,不”。,Mr.Wang, must I come again on Sunday morning to cleanthe windows?No, you _.I have asked others to do it.(2009 年广东),Adont have toCcant,BmustntDshouldnt,A,must 引导的一般疑问句的否定回答为“No, .neednt.”,或“No, .dont have to.”，表示“不必”。,You _ cross the road when the traffic light is red.Itsdangerous.,AneedntCmustnt,Bmay notDdont have to,C,题意：红灯亮时禁止过马路，那很危险。neednt 不必；,may not 不可能； mustnt 禁止；dont have to 不必要。根据题意可知选 C。,late,他说他可能会迟到。He said he _ _ _.3I think we should start walking, and then stop at noon for ourpicnic.我认为我们应该出发，走到中午然后停下来吃饭。,be,might,should 是情态动词，意为“应该”，表示义务、责任。如：We should honor the teacher and respect his teaching.我们应该尊师重教。We _ fight against pollution.,AmayCmustnt,BshouldDneednt,B,题意：我们应该和污染作斗争。should 表示义务、责任。,4I may need a rest very soon.我可能不久就需要休息一下。,(1)may 是情态动词，在此意为“可能”，表示一种猜测。,如：,He may come tomorrow.他可能明天来。,(2)need 在此作实义动词，意为“需要”，有人称和数的变,化，后接名词、代词、动名词或动词不定式。如：,I need to borrow a book for the exam.为了这次考试我需要借一本书。,(1)may 作情态动词还可意为“可以”，表示许可、请求，其过去式为 might。回答 may 引导的一般疑问句时，其否定回答要用 mustnt，而不用 may not。如：May I come in? 我可以进来吗？No, you mustnt.不，你不可以。,(2)need 还可作情态动词，意为“需要，必须”，一般用于,否定句和疑问句中。如：,You neednt get up so early today.今天你不必这么早起床。,Anna hasnt come to school today.I think she _ be ill.,AcanCmay,Bhas toDshould,C,题意：今天安娜还没来学校，我想她可能病了。can 能,够，表示能力；has to 不得不，表示客观因素迫使；may 可能，表示猜测；should 应该，表示义务、责任。故选 C。,Amay,BShould,Cmust,Dneed,A,题意：这些报纸是免费的。如果你喜欢，你可以拿一份。,may 表许可，符合题意。,These newspapers are free.You _ keep one if you like.,It doesnt look like rain, so you _ bring yourumbrella with you.(2010 年广东广州 ),AshouldntCcant,BmustntDne