Unit 2 Topic 3情态动词及话题重点知识点讲析课件 2024-2025学年仁爱科普版八年级英语上册

Unit 2 Topic 3 Must we exercise to prevent the flu? 1. Must we exercise to prevent the flu? “Must we/I ...?” 肯定回答: Yes, we/you must. 否定回答: No, we/you needn’t. / don’t have to. 注: 此处不能用 mustn’t (禁止；不准)回答 Eg: 我现在必须完成我的作业吗？ Must I finish my homework now ? No, you needn’t. / No, you don’t have to. *have to 意为 “不得不”,强调客观需要,用于各种时态。 肯定：主语+have/has/had to +V原形+其他 否定：主语+don’t/doesn’t/didn’t have to V原形+其他 疑问：助动词+主语+have to +V原形+其他 Eg: It’s seven p.m. I have to leave now. We don’t have to be afraid of catching disease. Does he have to buy a new bike? must个人意志和主观上的“必须”，无时态的变化 Eg: I know I must study hard. My grandma was ill, so I had to call the doctor in the middle of the night. 2. May I ask you some questions, Dr. Li? ①“May I... ？”日常交际中表示请求的句型。 ②question“问题，疑问”，指较容易解决的问题及口头回答的问题;对某事疑惑不解需要寻找答案的问题；搭配的动词ask或answer. problem：指难以解决的问题，尤指比较困难的问题，如社会、政治和经济问题；搭配的动词work out或solve. Eg: Can you answer the question? This is a difficult question to answer. We must solve the problem of heavy traffic in Beijing as soon as possible. 3. So what should we do to prevent it? ①不定式短语 to prevent it 作目的状语。 Eg: 玛利亚回古巴庆祝生日。 Maria went back to Cuba to celebrate her birthday. ②prevent v. 阻止 阻挠 prevent/ stop / keep…..from doing sth. 阻止......做某事 Eg: 没有任何事情可以阻止我们前往。 Nothing can prevent us from going. 4. Well, first, we should exercise often to build us up. ①exercise是动词，锻炼 Eg: 你多长时间锻炼一次? How often do you exercise? ②build sb./yourself up 增强体质,使更加强壮 Eg: 你得多锻炼增强体质。 You need to do more exercise to build yourself up. 5. Finally, we should keep away from crowded places. ① finally=at last=in the end 最后 ② keep away from ... 远离…... Eg: 当心，远离火源。 Be careful. Keep/Stay away from the fire. 6. Could I speak to Dr. Li Yuping? 请问我可以和李宇平医生通话吗？ 电话用语 May/Could/Can I speak to...? 请找 ……接电话好吗？ 本人接电话：Speaking./ This is … speaking. 非本人： I’m sorry he (she) is busy now./ Sorry, he (she) isn’t here. 回答： 7. I’ll ring him up later. 好的，我一会儿再给他打电话。 ring sb. up = call sb. up 给某人打电话 ring up 若后接人称代词，代词必须位于ring up 中间；如果是名词，位于ring up 的中间或后边都可以。 Eg: 李雷每天都给他的妈妈打电话。 Li Lei rings up his mother every day. = Li Lei rings his mother up every day. 你明天会给我打电话吗？ Will you ring me up tomorrow? 8. Can I leave a message? 留言，留口信 leave a message for sb. 给某人留言 take a message for sb.= give sb. a message 给某人捎个口信 Eg:请给他带个口信。 Please take a message for him. = Please give him a message. 9. Be on time and don’t forget to take your camera. 请准时参加，别忘了带照相机。 forget to do sth. 忘记去做某事（事情没做） forget doing sth. 忘记曾做过某事 （事情已做） I forgot to close the window when I left this morning. 今天早晨离开时我忘记关窗户了。（窗户没关） I forgot closing the window. It was closed when I came into the room. 我忘记曾经关过窗户，当我进入房间时，窗户是关着的。 Eg: 10. ...but I can’t finish it by myself. 反身代词 （1） 表强调 you must do it yourself. （2） by +反身代词 by yourself Person Number First person Second person Third person Singular yourself herself itself Plural ourselves myself yourself himself themself 11. ..., so try to stay safe when you play them. ..., 所以你在运动时，要尽量保证安全。 try to do sth. 尽力/量力去做某事,设法去做某事 Eg:We try to improve our spoken English 我们应尽力提高我们的英语口语。 try doing sth 试着去做某事 Eg: You should try eating more fruit. 你应该试着多吃些水果。 12. On the other hand, you may feel ill if you are always unhappy.另一方面，如果你总是不开心，你可能会感到像生病了似的。 ① if为连词，意为“如果，假如”, 引导条件状语从句描述两件事的依赖与被依赖关系。条件状语从句可置于句首，也可置于句尾，常用一般现在时代替一般将来时。 Eg: We will go hiking if the weather is fine tomorrow. 如果明天天气好，我们就去远足 If I have enough money, I will buy a big house. 如果我有足够的钱，我会买一所大房子 ② unhappy为形容词，意为 “不高兴的,伤心的”。 前缀un用于构成形容词, 或用于由这些形容词构成的副词及名词前，意为“不”， 表示否定或反义。 Eg: fair (公平的) --unfair (不公平的) happy (快乐的)--unhappy（不快乐的） able（能够，有能力的）--unable（不能的，不会的） 13. You should say no to smoking and drinking. 你应该拒绝烟酒。 say no to doing sth “拒绝做某事/戒除...” 为介词，后接名词或动名词。 类似词组有say yes to sb./ say hello to sb./say sorry to sb Eg: We all want to say goodbye to him at the airport. 我们都去机场跟他告别。 14. The more exercise, the better. 锻炼越多，身体越好。 the+比较级, the+比较级 越...越... Eg:越多越好。 The more, the better. 15. We should stop exercising when we are hurt. stop doing sth. 停止做某事 1. 远离 2. 阻止...做... 3. 增强体质 4.请找……接电话好吗？ 5.恐怕…… 6. 给某人打电话 7. 留口信 keep away from build sb. up prevent... from doing... ring sb. up = call sb. up leave a message for sb. be afraid + 句子 May/Could/Can I speak to...? 8. 给某人捎个口信 9.忘记去做某事 忘记曾做过某事 10.越...越... 11.尽力/量力去做某事 12.试着去做某事 13.停止做某事 14.拒绝做某事/戒除... give sb. a message the+比较级 ,the+比较级 forget to do sth. stop doing sth. try to do sth. try doing sth forget doing sth. say no to doing sth THANK YOU $$