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重点句子及知识点讲解 1.--- Can you come to my party ? ---Sure , I'd love(like) to . / I'm sorry , I can't . I have to help my parents . ⑴ 情态动词can的用法 1. (表示能力、功能)能,会 The classroom can seat thirty students. 这教室能坐三十位学生。 June can drive now. 琼现在会开车了。 2. (表示可能性)可能,可能会 I think the work can be completed ahead of time. 我认为这项工作能提前完成。 3. (表示允许、请求)可以 You can't take the book out of the room. 你不可以将这本书拿出室外。 Can I use your pen? 我可以用一下你的笔吗? 4. (表示命令)必须 If you won't keep quiet you can get out. 你如不保持安静,就请你走。 5. (表示偶然发生的可能性)有时会 It can be quite windy there, especially in spring. 那里有时容易刮风,特别在春季。 6. (表示惊讶)究竟;竟至于 What can it possibly be? 到底那是怎么一回事? n. 1. (食物)罐头 2. 金属容器 情态动词can在这里起征求对方意见的作用。 Can you play tennis with me ? ⑵ can 和 be able to 的用法区别 1)can could 表示能力;可能 (过去时用could), 只用于现在式和过去式(could)。be able to可以用于各种时态。表示现在或过去能力时两者可以互换。 They will be able to tell you the news soon. 他很快就能告诉你消息了。 2)只用be able to a. 位于助动词后。 b. 情态动词后。 c. 表示过去某时刻动作时。 d. 用于句首表示条件。 e. 表示成功地做了某事时，只能用was/were able to， 不能用could。 He was able to flee Europe before the war broke out. = He managed to flee Europe before the war broke out. 3)be able to 可以接在不定式后，而看不能 I hope to be able to go to the movies with you on Sunday. 4) be able to 的过去式还表示经过努力而做到，而could 无此意。 He studied hard and was able to pass the exam. 5) 当表示猜测，轻轻和允许时，只能用can，不能用be able to . He can't be at home now. 他现在不可能在家 ⑶ sure 的用法 常用于口语中，作为说话人较有把握的肯定回答，相当于 certainly 或 yes be sure to do sth 一定会做某事 He is sure to come here. be sure of sth 对某事有把握 She is sure of success. be sure that 肯定...... I' m sure that he will come. feel sure= be sure确信 make sure 弄明白,查明白 make sure of 尽力做到,将...弄明白,保证 2. I have too much homework this weekend . too much后跟不可数名词;too many后跟可数名词复数 3. That's too bad . 4. Maybe another time . 5. Thanks for asking . for介词，后跟名词，代词或动名词 Thank you for inviting me 6. Come and have fun . / Come and join us . 7. On Wednesday, I'm playing tennis with the school team. 8. I have to study for my science test on Thursday. have to强调客观原因;而must强调主观原因 have to 否定形式 don't / doesn't / didn't have to / have not to 9. Please keep quiet ! I'm trying to study . try to do sth. 表示" 尽力做某事 " , 不包含是否成功的意思 1.keep back 保留;隐瞒;阻止......向前。如： She couldn't keep back her tears at the news. 听到那消息，她忍不住掉下了眼泪。 2. keep in touch with...与 ......保持联系。如： While he was outside the ship, he kept in touch by telephone with his companion and with the earth. 3. keep on(doing sth.) 继续(做某事);反复(做某事)。如： Keep on trying, and you'll make greater progress. 继续努力，你将取得更大的进步。 4. keep...out 不让 ......进来。如： There is a lot of air in loose snow, and this helps to keep the cold out. 在松散的积雪里有许多空气，这有利于御寒。 5. keep...out of...使......不进入......，使......置身于 ......之外。如： Please keep him out of trouble while he is studying here. 他在这里学习期间，请不要让他有什么麻烦。 6. keep up坚持;保持;不使(斗志等)下落。如： They can keep up their normal body temperature even in very cold weather. 7. keep up with保持;维持;继续;跟上。如： John was not good at maths and he couldn't keep up with the rest of the class. 约翰数学不好，他跟不上其他同学 8. keep watch守望;值班;放哨。如： They used to keep watch at the top of the tree during the war. 在战争期间，他们通常在树顶上放哨。 9. keep away from (使)离开;远离。如： In order to reduce diseases we should keep animals away from body in daily life. 10. Do you want to come to my birthday party ? want to do sth.意思是"想要做某事" 11. Li Lei is going fishing with grandpa the whole day . the whole day = all day 整天 all 与 whole 的用法区别 ⑴都可用在表示整体的单数名词之前，但限定词的位置不同。 Whole 一般位于冠词，物主代词或别的限定词之后，结构： 限定词+whole +单数名词 ;all 则位于这些词之前，结构： all +限定词+单数名词 All the city / the whole city are busy cleaning the streets. ⑵ 加复数名词时 结构：all +限定词+复数名词 the whole of + n.(pl.) ⑶ whole 一般不能修饰n.[u]或物质名词 12. Can you come over to my house ? come over 顺便来访 13. I'm free till 22:00 . free: adj. 免费的，空闲的 freedom n.自由 14. lesson 用法 Lesson 与 class 的区别：Lesson 指教科书中的"一课" ，也指"功课，课程，教训" ; class 指"班级，课堂;一节课"， 也可以指"班级里的同学" You know your less well. We have four classes today. 搭配： have / take a less = have / take a class 上课 Lesson One = the first lesson Give sb a lesson 教训某人 15. invite 用法 invite sb to do sth 邀请某人做某事 invite sb to sp 邀请某人去某地
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