人教版新目标英语九年级复习课件情态动词

,（一）动词的种类 动词是表示动作或状态的词，按其词义和在句子中的作用可分为行为动词，连系动词，助动词和情态动词。,1行为动词实义动词 行为动词可分为及物动词 (vt)和不及物动词(vi)，及物动词表示动作或状态，有完整的词义，能单独作谓语，后跟宾语；不及物动词表示动作或状态，有完整的词义，能单独作谓语，但后面不能直接跟宾语，如要带宾语则与介词或副词构成短语。 如： More and more people study English.(vt) I have a book. (vt) She always comes late. The students are listening to the teacher carefully.(vi),2连系动词 连系动词本身有一定的词义，但不能独立作谓语，必须与表语一起构成谓语。常用的连系动词有 be, get, turn, become, look, feel, grow, seem, sound, taste, smell等。 如： Our country is becoming stronger and stronger. I feel happy. 3助动词 助动词本身无词义，不能单独作谓语，只能和主要动词一起构成谓语动词，表示否定，疑问及动词的时态、语态、人称和数等语法特征，助动词有 be,do,have,shall,will等。 如： How do you usually come to school? The children are playing yo-yo now. ,4情态动词 情态动词本身有一定的意义，但不能独立作谓语，只能和主要动词原形一起构成谓语，表示说话人的语气和情态。情态动词没有人称和数的变化。情态动词有 can (could),may(might),must, need, ought to, dare等。 如： Can I help you? - Must we go now? No, you neednt . a. can与be able to的用法有所区别。can只用于一般现在时和过去时，指本身有能力的“能”；be able to用于各种时态均可，指须经过努力而“能”。 b. must与have/has to的用法。must表示说话人主观认为“必须”，只用于一般现在时和一般将来时；have/has to表示客观需要，意为“不得不”，它可用于各种时态。 cneed和dare既可作情态动词也可作行为动词。,情态动词,can / could 表示能力、可能性、许可、征求对方意见等 Little Maggie can dress herself now. You can go to Miami by train. It cant be my father. He is not here. Can I use your phone? Could you please help me.,may / might 表示可能性、许可、祝愿等 May I come to see you? You may/can phone me tomorrow. Mary is absent. She may/might be ill. May you succeed. might have done 表示本可以做而未做,must / have to must 必须 have to 不得不 1.We must keep our word. 2.I have to wear school uniform. have to 的否定式相当于neednt，表示没有义务、没有必要做； Must的否定式用mustnt表示禁止,You dont have to / dont need to/ neednt tell him the truth. All these exhibits mustnt be touched. must可以表示肯定猜测 1.You must be ill. I can see it from your face. (must do 对现在、未来猜测) 2.Its 1:00 am, she must be sleeping now. (must be doing表示对现在进行猜测) 3.It must have rained last night. (must have done 表示对过去的猜测),must 引导的一般疑问句 Must I return your book this week? Yes, you must./ you have to. No, you neednt.,shall / should / ought to shall用于第一、三人称疑问句中，表示说话人征求对方的意见或请求 1.Shall Tom go there with me? 2.Shall we watch movies? Shall用于第二、三人称陈述句中，表示说话人给对方的许诺、命令、警告、威胁等。 1.Tell Jerry that he shall get a gift if he is nice.,shall用于第三人称陈述句中。在条约、规定、法令等文件中表示义务或规定。 1.The National Party Congress shall be held every five years. should表示责任、义务 should have done/ shouldnt have done,will / would 表示意愿、请求等 I will help you. Will you come this way, please? Would you open the window, please? 表示习惯或特性 1.This old man is strange. He will sit for hours without saying anything.,used to/ usednt to, didnt use to / did use to Need常用语疑问句、否定句和条件句。 1.Need I tell him every