Unit 2《Sporting events》Grammar and usage課件2（18張PPT）（牛津譯林版必修4）

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Unit2 grammar and usage,Modal verbs 1.Ability (1)He can run the 100m sprint in 11 seconds. (2)Can the girl read before she goes to school?,ought to/should,1.表示義務(wù)，“應(yīng)該”，用于各種人稱 You should be polite to your teacher. You shouldn’t spend so much time playing computer games. 2.表示推測(cè)，“想必，估計(jì)”的意思． If they start today, they should arrive there in two days. 3.表示與想象的不一樣”照說(shuō)應(yīng)該……” I wonder where Mary is. she should be here now.,4.在某些從句中，表示虛擬語(yǔ)氣． He suggested that I (should) go to shanghai tomorrow. He demanded that we (should) solve the problem at once. 5.表示驚訝，憂慮，惋惜等感情色彩． I am surprised he should eat so little every day.,Have to/must,have to 表示客觀需求 must 表示主觀愿望 Everyone has to go to school at the age of 7 in the country. We must wok hard to make our country strong and rich. You must work hard to win the gold medal.,Certainty might/may/could/should/ought to/will /must,She might win a medal at the Olympics. She may be at home now. She could read and write at the age of 4. She should come to join us. She ought to/will /must help me whenever I am in trouble.,Permission can /could/may/might,A: Can I watch the Olympics ? B: Yes, you can.? No, you can’t. A: May I have a look at you photo? B: Yes, you may./ No, you mustn’t. No, you’d better not. Could比can 更委婉，might比may 更委婉,Make requests,Will; can; could; would A: Can/Will /Could/Would you help me with my training? B: Yes, I can/will/can/will.,Make suggestions,Shall we/I /He/She/They do some exercise this morning? Shall常用于第一，三人稱，表示征求對(duì)方意見(jiàn) A: Shall he come in? B: Ok.,Make offers,I’ll wash your sports jacket. Shall I get a ticket for you? Shall we carry the books for you ? Shall I clean the blackboard for you?,give advice,You should not/ought not to eat a lot before swimming. The students should spend all their time working at their lessons. We should not laugh at those who are in trouble.,和其他時(shí)態(tài)的連用,The boys may be playing football on the playground. The boys may have finished their homework by the time school is over. He plays basketball very well. He must have practiced it a lot. Our headmaster must have been to USA, for he knows the country so much.,must have done 的反意疑問(wèn)句,You must have seen the film, haven’t you? You must have seen the film last week, didn’t you? His parents must have beaten him, haven’t they? His parents must have beaten him yesterday, didn’t they?,can / be able to,can 的形式只有can ;could兩種 be able to 的形式有am/is/are able to; was/were able to; have/has been able to等多種 Can 一般能力 Be able to 經(jīng)過(guò)努力后而達(dá)到的一定境界 My brother can play table tennis. My brother is able to dive under water for 10 minutes.,shall will,Shall表達(dá)諾言;will表示決心或決定 Don’t worry. You shall have the tickets for the games. Liu Mei will go and buy the tickets for the games.,Shall +一，三人稱？Will+二，三人稱？,1. Shall we go swimming this weekend? 2. A group of students are waiting to see you outside. Shall they come in? 3. Will you go hiking with me in the mountains? 4. Will he pay for me ?,mustn’t needn’t,mustn’t “不準(zhǔn)，不許” 語(yǔ)氣強(qiáng)烈 needn’t “不需要，沒(méi)必要” 語(yǔ)氣緩和 You mustn’t miss this football match. It’s very important. You needn’t watch the game if you don’t want to. Must we clean the classroom? Yes, you must. /No, you needn’t.,need dare,作為情態(tài)動(dòng)詞時(shí)，兩個(gè)詞常用于疑問(wèn)句和否定句；用作實(shí)義動(dòng)詞時(shí)，可用于各種句式． 情態(tài)動(dòng)詞時(shí)： ---Need I help you? ---Yes, please. You needn’t telephone him now. How dare you talk to the teacher like that? The girl dare not go out alone at night.,用作實(shí)義動(dòng)詞時(shí),We need to tell him the news. You don’t need to tell him the news. Do the flowers need watering? I didn’t dare to tell you the truth. Would you dare to catch the snake with your hand? The boy dares to do anything he likes.,同學(xué)們,來(lái)學(xué)校和回家的路上要注意安全,同學(xué)們,來(lái)學(xué)校和回家的路上要注意安全,