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1、,Section A Grammar Focus-3c,To learn to use “Can you/he/they?” to make invitations. To use the following structure to talk about obligations: I might have to/must To learn how to communicate with others politely.,Objectives,Hey, Anna, can you come to my birthday party on Saturday? ,Oh, Sam! I rememb
2、er we went bike riding last fall when ,Review,Can you play chess with me tomorrow afternoon?,Sure. Id love to.,Im afraid not. I have the flu.,Can Lily take a walk with us?,No, she cant. She must prepare for the exam.,Grammar Focus,Make two conversations using “Can.?”,1.-Can you.? -.(接受）,2.-Can you.?
3、 -.(拒绝）,情态动词主要有：may/might, can/could, must, have to, shall/should, will/would, ought to, need, dare, used to,现在我们来着重学习情态动词can 以及 have to 的用法。 其特征主要有：,情态动词 can 的基本用法 情态动词 can 有一定的词义，但不能独立存在，它必须与动词原形一起构成谓语。情态动词 can 没有人称和数的变化。其具体用法如下: 表示“能、会”指脑力或体力方面的“能力”。如: I can speak Japanese. 我会讲日语。 Frank can swim
4、but I cant. 佛兰克会游泳, 但我不会。,2. 表示“可能”，常用于否定句或疑问句中，指某种可能性。例如： My cousin cant be in this city. He is in Korea now. 我堂兄不可能在这个城市里。他在韩国呢。 Can he come to our club today, please? 请问他今天能来我们俱乐部吗？ 3. 表示“可以”，常用于口语中，指许可或请求做某事 Can I ask you a question? 我可以问你一个问题吗？ You can bring something to eat. 你可以带些吃的。,can为情态动词,
5、 在本单元中表示请求，用于发出邀请，后跟 动词原形。当同意接受对方的邀请时，常用Sure, Id love to. / Certainly. /Of course.等来回答；若不接受，常用Sorry 等来有礼貌地拒绝，一般情况下需要说明不能接受邀请的原 因以表示歉意。 Can you come to my birthday party tomorrow？ 明天你来参加我的生日聚会，好吗？ Sorry, I cant. I am going to visit my grandpa. 很抱歉，我来不了，我要去看我爷爷。,can/may (1)都可表示“许可” 。may用于较正式场合，can比较口语
6、化。 You may/can smoke here. Borrowers may not take out of the library more than two books at a time. The policeman says you cant park here. (2) May/Can I/we? 表示征询对方许可。 Can you? 表请求。 May I use your phone? Yes, you may./Yes, please. /No, you may not. /No, you mustnt. /No, youd better not. /Im afraid no
7、t.,/Im sorry. Id rather you didnt. Can I go out and play, Mum? Yes/Certainly, you can. /No, you cant. Can you help me with this bag? With pleasure./Sorry, I cant. (3) 都可表示“可能性” Mr. Reed looks pale. He may be ill. Mr. Read is in poor health. He can be ill at any time. This news may be true. (=might/c
8、ould) Wang Wei can be really stubborn.,Mr. Reed looks pale. He may be ill. Mr. Read is in poor health. He can be ill at any time. This news may be true. (=might/could) Wang Wei can be really stubborn.,(4) can 还可表示“能力”、“能够” You can swim, cant you? No, I cant. I cant promise anything, but Ill do what
9、I can. Tickets can be bought from the Tourist Information Center.,have to 的用法 1. have (has) to + 动词原形 have (has) to 后面要用动词原形。当主语为第三人称单数时用 has to，当句子是过去时用 had to。 We have to go home now. 我们不得不现在就回家。 He has to work on Sunday. 他不得不在周日工作。 I had to do much housework last Sunday. 上周日我不得不做很多作业。,2. have to
10、的否定句句型： 主语 +dont/didnt/doesnt wont +have to + 动词原形 You dont have to walk so fast. 你不必走那么快。 He will not have to buy a new coat next year. 明年他没必要买新外衣了。 3. have to 的疑问句句型： Do/Does/Did/Will + 主语 + have to + 动词原形,Did he have to ask the question? 他非要问那个问题吗？ Yes, he did. 是的。 No, he didnt (have to). 不。,不能独立
11、作谓语，只能和动词原形一起构成谓语， 表示说话人的语气和情态。 2. 没有人称和数的变化。 (have to除外) 3. 否定形式：在其之后加not (have to除外) 疑问形式：情态动词提到主语之前(have to除外)。,3. have to的意思是“必须、不得不”, 往往强调由于客观原因 而必须做某事。 have to 后接动词原形；have to有人称、数和 时态的变化, 其第三人称单数形式为has to, 其疑问形式和否定 形式要借助于助动词do或does来完成。例如： We have to look after our sister at home. 我们不得不在家照顾我们的妹
12、妹。 Does he have to get up early tomorrow morning? 明天早上他必须早起吗？ I dont have to stay at home today. 今天我不必待在家里。,4. must/have to must 表示主观“必须”；have to表示客观客观需要，即 “不得不” 。 I dont like this TV set. I must buy a new one. This TV set doesnt work. We have to buy a new one.,You must get up at five tomorrow. We (
13、will) have to get up early tomorrow. I had to leave early because I wasnt feeling well. She said she must/had to see the manager.,表示邀请的句型: (你能来参加我的聚会吗?),Can you come to my party?,Could you come to my party?,Would you like to come to my party?,接受邀请: 拒绝邀请:,Sure, Id love/like to.,Im sorry, I cant. I ha
14、ve to /Im V-ing,小结,1. A: What are you going to do on Saturday? B: Im not sure. I might _ 2. A: What are you planning to do after school? B: I dont know. _,watch TV on the weekend my cousin visit grandparents practice the violin,practice the violin.,I might watch TV.,Complete the answers with might a
15、nd one of the phrases in the box.,3a,3. A: When will you finish the science homework? B: _ 4. A: Who are you going to the movies with? B:_ 5. A: Are you free to come to my place on Saturday? B: _,On the weekend.,My cousin.,No. I might visit grandparents.,1. Inviting: (can / play tennis) _ Accepting:
16、_,Can you come to play tennis?,Sure, that sounds great.,Complete the sentences below. Use the words in brackets to help you.,3b,2. Inviting: (would like to/ go to the movies) Reason: (might have to) _ Refusing:_ _,Would you like to go to the movies?,Im afraid not. I have too much,homework to do.,3. Inviting: (can/hang out with us tonight) Reason: (must) _ Refusing: _ _,Can you hang out with us tonight?,No, I cant. I must finish my homework.,4. Inviting: (would like to / come to my birthday party
