2021年秋人教版八年级上册英语教学课件 Unit 9 Section A Grammar Focus-3c

1、Section A Grammar Focus-3cSection A Grammar Focus-3c u To learn to use “Can you/he/they?” to make invitations. u To use the following structure to talk about obligations: I might have to/must u To learn how to communicate with others politely. Objectives Hey, Anna, can you come to my birthday party

2、on Saturday? Oh, Sam! I remember 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. Can you come to my party on Saturday? Sure, Id love to

3、./Sorry, I must study for a math test. Can you go to the movies tomorrow night? Sure. That sounds great. Im afraid not. I have the flu. Can he go to the party? No, he cant. He has to help his parents. Can she go to the baseball game? No. shes not available. She must go to the doctor. Can they go to

4、the movies? No, theyre not free. They might have to meet their friends. Grammar Focus 1.-Can you.? -.(接受）接受） 2.-Can you.? -.(拒绝）拒绝） 情态动词主要有：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现在我们来着重学习情态动词can 以及以及 have to 的用法。的用法。 其特征主要有：

5、其特征主要有： 情态动词情态动词 can 的基本用法的基本用法 情态动词情态动词 can 有一定的有一定的词义，但词义，但不能独立不能独立存在，它存在，它必须必须 与动词原形一起构成谓语。情态动词与动词原形一起构成谓语。情态动词 can 没有人称和数没有人称和数 的变化。其具体用法如下的变化。其具体用法如下: 1. 表示表示“能、会能、会”指脑力指脑力或体力方面的或体力方面的“能力能力”。如。如: I can speak Japanese. 我会讲日语我会讲日语。 Frank can swim but I cant. 佛兰克会游泳佛兰克会游泳, 但我不会。但我不会。 2. 表示表示“可能可能”

6、，常用于否定句或疑问句中，指某种可，常用于否定句或疑问句中，指某种可 能性。例如：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。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? 请问请问他今天能来我们俱乐部吗？他今天能来我们俱乐部吗？ 3. 表示表示“可以可以”，常用于口语中，指许可或请求做某，常用于口语中，指许可或请求做某事事 Can I ask you a question? 我我可以问你一个问题吗可以问你一个问题

7、吗？ You can bring something to eat. 你可以带些吃的。你可以带些吃的。 can为情态动词为情态动词, 在本单元中表示在本单元中表示请求请求，用于发出邀请，后跟用于发出邀请，后跟 动词原形动词原形。当同意接受对方的邀请时，常用。当同意接受对方的邀请时，常用Sure, Id love to. / Certainly. /Of course.等来回答；若不接受等来回答；若不接受，常用常用Sorry 等来有礼貌地拒绝等来有礼貌地拒绝，一般情况下需要说明不能接受邀请的原一般情况下需要说明不能接受邀请的原 因以表示歉意。因以表示歉意。 Can you come to my

8、birthday party tomorrow？ 明天你来参加我的生日聚会，好吗？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。很抱歉，我来不了，我要去看我爷爷。 can/may (1)都可表示都可表示“许可许可” 。may用于较正式场合，用于较正式场合，can比较口语化。比较口语化。 You may/can smoke here. Borrowers may not take out of the library more than two books at a time. T

9、he policeman says you cant park here. (2) May/Can I/we? 表示征询对方许可。表示征询对方许可。 Can you? 表请求。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 not. /Im sorry. Id rather you didnt. Can I go out and play, Mum? Yes/Certainly, you can. /

10、No, you cant. Can you help me with this bag? With pleasure./Sorry, I cant. (3) 都可表示都可表示“可能性可能性” 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/could) Wang Wei can be really stubborn. Mr. Reed looks pale. He may be ill. Mr. Re

11、ad 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 还可表示还可表示“能力能力”、“能够能够” You can swim, cant you? No, I cant. I cant promise anything, but Ill do what I can. Tickets can be bought from the Tourist Information Center. have to

12、 的用法的用法 1. have (has) to + 动词原形动词原形 have (has) to 后面要用动词原形。当主语为第三人称单后面要用动词原形。当主语为第三人称单 数时用数时用 has to，当句子是过去时用，当句子是过去时用 had to。 We have to go home now. 我们我们不得不现在就回家。不得不现在就回家。 He has to work on Sunday. 他他不得不在周日工作。不得不在周日工作。 I had to do much housework last Sunday. 上周日上周日我不得不做很多作业。我不得不做很多作业。 2. have to 的

13、的否定句否定句句型句型： 主语主语 +dont/didnt/doesnt wont +have to + 动词原形动词原形 You dont have to walk so fast. 你你不必走那么快。不必走那么快。 He will not have to buy a new coat next year. 明年明年他没必要买新外衣了。他没必要买新外衣了。 3. have to 的的疑问句疑问句句型句型： Do/Does/Did/Will + 主语主语 + have to + 动词原形动词原形 Did he have to ask the question? 他他非要问那个问题吗？非要问那个

14、问题吗？ Yes, he did. 是的。是的。 No, he didnt (have to). 不。不。 1. 不能独立作谓语，只能和动词原形一起构成谓语，不能独立作谓语，只能和动词原形一起构成谓语， 表示说话人的语气和情态。表示说话人的语气和情态。 2. 没有人称和数的变化。没有人称和数的变化。 (have to除外除外) 3. 否定形式：在其之后加否定形式：在其之后加not (have to除外除外) 疑问形式：情态动词提到主语之前疑问形式：情态动词提到主语之前(have to除外除外)。 3. have to的意思是的意思是“必须、不得不必须、不得不”, 往往强调由于客观原因往往强调由

15、于客观原因 而必须做某事。而必须做某事。 have to 后接动词原形；后接动词原形；have to有人称、数和有人称、数和 时态的变化时态的变化, 其其第三人称单数形式第三人称单数形式为为has to, 其其疑问形式和否定疑问形式和否定 形式形式要借助于助动词要借助于助动词do或或does来完成。例如：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妹。我们不得不在家照顾我们的妹妹。 Does he have to get up early tomorrow morning? 明天早上他必须早起吗？明天早上他必须早

16、起吗？ I dont have to stay at home today. 今天我不必待在家里。今天我不必待在家里。 4. must/have to must 表示主观表示主观“必须必须”；have to表示客观客观需要，即表示客观客观需要，即 “不得不不得不” 。 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 (will) have to get up early to

17、morrow. I had to leave early because I wasnt feeling well. She said she must/had to see the manager. 表示邀请的句型表示邀请的句型: (你能来参加我的聚会吗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? 接受邀请接受邀请: 拒绝邀请拒绝邀请: Sure, Id love/like to. Im sorry, I cant. I have t

18、o /Im V-ing 小结小结 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 and

19、 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:_

20、Can you come to play tennis? Sure, that sounds great. Complete the sentences below. Use the words in brackets to help you. 3b invite v.邀请邀请 invite sb. to do sth. accept v. 接受接受 2. Inviting: (would like to/ go to the movies) Reason: (might have to) _ Refusing:_ _ Would you like to go to the movies? I

21、m afraid not. I have too much homework to do. refuse v. 拒绝拒绝 refuse to do sth. 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) _ Accepting:_ Wo

22、uld you like to come to my birthday party? Sure, Id love to. Write down everything you have to do next week. Choose a day and time to have a party. Then invite classmates to your party. A: Can you come to my party? B: When is it? A: Next week, on Thursday night. B: Im sorry. I have to study for a ma

23、th test. 3c What do you usually do on weekends? What activities do you do on weekends? have to 不得不不得不 A: What do you have to do this weekend? B: I have to What weekend activities do you do? colorful weekend activities go shopping go skateboarding play soccer go to the cinema colorful weekend activit

24、ies play the piano climb mountains go to a party surf the Internet 1. Jim play soccer with his friend this weekend, because he is very busy. A. can B. cans C. cannt D. cant 2. Henry his homework this afternoon. A. have to do B. have to doing C. has to do D. has to doing 3. ? Its October the 14th. A.

25、 When is today B. Whats today C. What time is today D. What day is today D C I. 选择填空。 D 1. 星期六你能来我的聚会吗？星期六你能来我的聚会吗？ _ you _ to my party on Saturday? 2. 当然，我当然，我乐意去。乐意去。Sure, _ _ _. 3. 对不起，我对不起，我必须为数学考试而学习。必须为数学考试而学习。 Sorry, I _ _ _ a math test. 4. 明天晚上你能去看电影吗？明天晚上你能去看电影吗？ _ you _ to the movies _night? Id love to Can come must study for Can go II. 根据课本内容, 完成下列句子。 tomorrow 5. 当然当然可以可以，听起来听起来很棒。很棒。 _, that _ _. 6. 恐怕恐怕不行，我不行，我得了流感。得了流感。 Im _ not. I have the _. 7. 他能参加