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1、八年级上册第九单元知识点1. can 的用法。（1）表示能力We can carry the heavy box.(2) 表示惊讶、不相信等，主要用于否定句和疑问句中。Can it be true?这会是真的吗？(3)表示允许，意思与may相近，主要用于口语中。Can I smoke here?2. Im sorry, I cant. I have to help my parents. 对不起，我不能去，我得帮我的父母。(1) have to 意思是“必须，不得不”。是客观被迫、不得不去做，而不是主观觉得应该去做We have to wear sports shoes for PE clas
2、s.(2) have to 和must的区别如下：have to 强调客观上需要做某事，含有形势逼迫的意思；must 强调说话者主观上认为必须做某事，含有主观判断的意思。My bike was broken on my way to school. I had to walk there. 我的自行车在上学的路上坏了，我不得不走路去上学。We must learn English well.我们必须学好英语。否定式的区别：have to 的否定式dont have to 意为“不必”dont have to=neednt. must 的否定式mustnt 意为“禁止；不允许”，因此，以must
3、 开头 的一般疑问句的肯定回答为“yes, 主语+must,” 否定回答为”No,主语+neednt/ dont have to.”Must I finish the homework now? 我必须现在完成作业吗？yes, you must.(no, you neednt/dont have to 是的，你必须现在完成。（不，你不必）时态的区别:have to 变化，而must 没有时态的变化。3. I have too much homework this weekend. 这周末我的作业太多了。Too much意为“太多”，和too many 想似，不同的是too much 修饰不可数
4、名词，而too many 修饰可数名词。much too 意为“太”，用来修饰形容词或副词。We have no time today. We have too much homework to do.There are too many students in our class.The box is much too heavy, so I cant carry it.4. Can you come to my party on Saturday? 句式can you?表示发出邀请，多用于口语。Can you come to my home for supper?你能来我家吃晚饭吗？肯定回
5、答：Sure/Certainly/Yes, Id love/ like to. Can you help me to find my pen? Sure, Id love to./ Certainly / Sure, I can.邀请他人的常用的表达方式还有:Would you like to? Do you want to?5. until的用法. (1) 肯定句+until+时间名词或名词短语 I waited for him until 12 oclock.(2)肯定句+until+句子 I will wait until he returns.(3)否定句+until+时间名词或从句，
6、 意为“直到才”I wont go to bed until I finish my homework 我要完成作业才睡觉。She didnt go to bed until I oclock. 她直到1点钟才上床睡觉。6. Im sorry. I am not available. 对不起，我现在没有空。available有多个意思（1）有空的Is there anyone available now? 现在有谁有空吗？(2) 有的；可以提供的 All the books on English study are available in our library.所有关于英语学习的书在我们图
7、书馆都有。(3)在手边的，可得到的，可获得的 My bike is not available. My brother is using it.我的单车不在这，我哥正用着呢。7. accept 的用法。（1）accept 是动词，意思是“接受“，如I would like you to accept my bitthday gift. (2) accept 和receive的区别: receive 只表明“接到；收到”某物的动作，而accept 不仅“收到”，并表示“愿意收下”。She received a gift from him, but didnt accept it.8. I loo
8、k forward to hearing from you all.我盼望能收到你们所有人的回信。look forward to “盼望，期盼”，其中to 是介词，后接名词、代词或动词ing 形式。Your birthday is a big event and I look forwark to it.I am looking forwark to watching the match.9. please reply in writing to this invitation by Friday, Demcember 20th. 请在12月20号星期五前书面回复这个邀请。reply意为“回答
9、案；答复“，它可作及物动词，也可作不及物动词，还可作名词。(1) 作不及物动词，常与介词to搭配，表示“对的答复”。例如：I am very angry. I wont reply to this letter.我非常生气，我不想回复这封信。(2) 作及物动词，后跟宾语从句 She replies that everyone will get a gift. 她回答说，每一个人都会得到一份礼物。(3) 作名词,常与介词to搭配。I didnt hear his reply. 10 重点短语 prepare for 为做准备; hang out 闲逛；look after 照顾；照料; the
10、day before yesterday前天；the day after tomorrow 后天; take a trip to 去旅行；at the end of 在尽头；末尾; help out帮助; so that以便；以致; look forward to 期盼；期待; hear from收到的来信八年级上册第10单元知识点1. if you go to the party, you will have a great time! (1)if意为“如果”，引导条件状语从句。在含有时间状语或条件状语从句的复合句中，如果主句是一般将来时，从句应用一般现在时表示将来时 If it doesn
11、t rain tomorrow, we will have a basketball match.(2)表示玩得愉快，可以用have a great time来表示，除此之外，还可以说have a good /wonderful/nice time; enjoy oneself2. -I think I will wear jeans to the party. -If you do, the teachera wont let you in. 如果你那样做，老师不会让你进去。（1）let sb in意思为“允许某人进入”in是副词，它的反义词是out. John is outside. Op
12、en the door and let him in.(2) do 在此指上文中出现的wear jeans to the party. 在英语中，常用do,does,did指代上文中出现的动作，以免重复；如果是否定，则用相应的dont, doesnt, didnt He doesnt want to buy a computer, but I do. 他不想买电脑，但我想买。3. too to的意思是 “太而不能”，注意它与sothat 的转换.如He is too young to go to school =He is so young that he cant go to school.
13、 4. Can you give me some advice, please? 你能给我一些建议吗？advice是不可数名词，some既可修饰可数名词，也可以修饰不可数名词。我们通常说“一个（则）建议，不能说成an advice，而是a piece of advice，而两则建议，通常说two pieces of advice. 注意piece 要用复数，advice不可数,但piece可数。我们也可说some pieces of advice.5. should的用法. should 为情态动词，与动词原形连用，表示“应该；应当”常用来表示建议或者命令等。should和can, may,
14、must一样，没有人称和数的变化，不能单独做谓语，必须和后面的动词原形一起构成谓语。（1）用来表示“应该”或“不应该”的概念。此时常指长辈教导或责备晚辈。You should be here with clean hands.你应该把物洗干净了再来。(2)用来提出意见劝导别人。 You should go to the doctor if you feel ill.(3) 用于表示可能性 We should arrive by supper time.6. join 和take part in 的区别.join 用于加入组织或团体，成为一员，也可以直接加人，表示加入他们的活动；take par
15、t in 用于参加某项活动。Would you like to join us?He joined the army in 1948. They took part in the game last Friday.7. Unless we talk to someone, well certainly feel worse. 如果不和别人讲，我们会感觉更糟糕.Unless 是连词，意为“除非；如果不”，引导是的条件状语从句。We cant learn a foreign language well unless we study hard.unless 连接的条件状语从句，等于if not，
16、不同点在于，ifnot 是口语,unless 是书面语，unless 有否定意义。I shall go there unless it rains.=I shall go there if it doesnt rain.我去，除非下雨。（如果不下雨，我就去）8. she just kept thinking.她只是一直在想. Keep doing sth 坚持做某事I keep reading the whole night.9. advise sb to do sth 建议某人去做某事 The doctor advised me to stop smoking.advise+that 从句, 谓语动词用
