人教版新目標(biāo)英語九年級復(fù)習(xí)課件情態(tài)動詞

,（一）動詞的種類 動詞是表示動作或狀態(tài)的詞，按其詞義和在句子中的作用可分為行為動詞，連系動詞，助動詞和情態(tài)動詞。,1行為動詞實(shí)義動詞 行為動詞可分為及物動詞 (vt)和不及物動詞(vi)，及物動詞表示動作或狀態(tài)，有完整的詞義，能單獨(dú)作謂語，后跟賓語；不及物動詞表示動作或狀態(tài)，有完整的詞義，能單獨(dú)作謂語，但后面不能直接跟賓語，如要帶賓語則與介詞或副詞構(gòu)成短語。 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連系動詞 連系動詞本身有一定的詞義，但不能獨(dú)立作謂語，必須與表語一起構(gòu)成謂語。常用的連系動詞有 be, get, turn, become, look, feel, grow, seem, sound, taste, smell等。 如： Our country is becoming stronger and stronger. I feel happy. 3助動詞 助動詞本身無詞義，不能單獨(dú)作謂語，只能和主要動詞一起構(gòu)成謂語動詞，表示否定，疑問及動詞的時(shí)態(tài)、語態(tài)、人稱和數(shù)等語法特征，助動詞有 be,do,have,shall,will等。 如： How do you usually come to school? The children are playing yo-yo now. ,4情態(tài)動詞 情態(tài)動詞本身有一定的意義，但不能獨(dú)立作謂語，只能和主要動詞原形一起構(gòu)成謂語，表示說話人的語氣和情態(tài)。情態(tài)動詞沒有人稱和數(shù)的變化。情態(tài)動詞有 can (could),may(might),must, need, ought to, dare等。 如： Can I help you? - Must we go now? No, you neednt . a. can與be able to的用法有所區(qū)別。can只用于一般現(xiàn)在時(shí)和過去時(shí)，指本身有能力的“能”；be able to用于各種時(shí)態(tài)均可，指須經(jīng)過努力而“能”。 b. must與have/has to的用法。must表示說話人主觀認(rèn)為“必須”，只用于一般現(xiàn)在時(shí)和一般將來時(shí)；have/has to表示客觀需要，意為“不得不”，它可用于各種時(shí)態(tài)。 cneed和dare既可作情態(tài)動詞也可作行為動詞。,情態(tài)動詞,can / could 表示能力、可能性、許可、征求對方意見等 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、許可、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 必須 have to 不得不 1.We must keep our word. 2.I have to wear school uniform. have to 的否定式相當(dāng)于neednt，表示沒有義務(wù)、沒有必要做； 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可以表示肯定猜測 1.You must be ill. I can see it from your face. (must do 對現(xiàn)在、未來猜測) 2.Its 1:00 am, she must be sleeping now. (must be doing表示對現(xiàn)在進(jìn)行猜測) 3.It must have rained last night. (must have done 表示對過去的猜測),must 引導(dǎo)的一般疑問句 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、三人稱疑問句中，表示說話人征求對方的意見或請求 1.Shall Tom go there with me? 2.Shall we watch movies? Shall用于第二、三人稱陳述句中，表示說話人給對方的許諾、命令、警告、威脅等。 1.Tell Jerry that he shall get a gift if he is nice.,shall用于第三人稱陳述句中。在條約、規(guī)定、法令等文件中表示義務(wù)或規(guī)定。 1.The National Party Congress shall be held every five years. should表示責(zé)任、義務(wù) should have done/ shouldnt have done,will / would 表示意愿、請求等 I will help you. Will you come this way, please? Would you open the window, please? 表示習(xí)慣或特性 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常用語疑問句、否定句和條件句。 1.Need I tell him every