九年级英语第四单元知识点讲解.doc

九年级英语第四单元单元知识点讲解 九年级英语第四单元单元知识点讲解Unit 4 知识点、短语、句子一、知识点1、give sb sth=give sth to sb类似的词还有:pass、lend、show、write、send等buy sb sth=buy sth for sb类似的词还有:make、draw、cook等2、hundred 、thousand、mi11ion与数字连用不能用复数。hundreds of、thousands of、mi11ions of中必须用复数。3、look for寻找find找到、发现find out指经过观察、探索、调查等弄清楚、弄明白。discover 指发现那些客观存在而不为人所知的实情。如科学上的重大发现。4、bring 带来 take 带走 fetch 去并拿来5、talk to/with sb 同说话。tell 告诉, 分辨，辨别。speak to sb 同说话，做及物动词，后跟语言。say 后跟名词、代词及宾语从句做宾语，着重强调说话内容。6、What if 如果将会怎么样？（引导条件状语从句、疑问句） eg What if she doesnt come? 她要是不来怎么办？ What if your parent dont agree? 如果你的父母不同意怎么办？ What if you should fall sick? 如果你生病了怎么办？7、before 引导一个句子，为连词。后跟短语或名词等，则为介词。8、food 表示食品种类，一种食物时，为可数名词 eg fried foods 油炸食品 break foods 早餐食品 frozen foods 冷冻食品9、复数名词可表示一类食品（如 dogs） a/an+单数可数名词可表示一类（如 a dog）10、confident(adj.) confidence(n.)11、What does/do look like? 问相貌。 Whats like? 问“品质性格”。12、 give a speech 做演讲 have a speech听演讲 give a report 做报告 have a report 听报告13、permission (n.) 允许，许可 permit (v.) 允许14、plenty of 充足的，相当多的。修饰可数或不可数名词，只能用于肯定句。否定、疑问句中用 enough.15、notin the slightest=notat all 根本不16、company 公司 一群人，一伙人 陪伴17、get along (with)=get on (with)进行，进展 eg The business is getting along very well. 生意进展的很顺利。 How are you getting along with your English study? 你的英语学习进展的怎么样了？相处 eg Do you get along with your boss?= Do you and your boss get along? 你跟老板合得来吗？ Im getting along very well with my classmates. 我和同学们相处得很好。18、would rather than （= would rather than）宁愿，而不愿。 前后连接两个动词原形，否定形式为：would rather not do sthwould rather than = prefer to 但prefer to 若连接两个动词，动词应为v-ing 形式。 eg He would rather jog than play football.=He prefers jogging to playing football.would rather 常单独使用，表示“宁愿做” eg He would rather watch TV at home.rather than = instead of 而不是 连接两个并列成分，前后对称。 eg Id prefer to go to in summer rather than in winter. I decided to write rather than telephone. I like going out with you rather than with him. She enjoys listening rather than speaking.19、today、here、there、downstairs、upstairs、above、below做宾语修饰名词，放在名词之后 eg the weather today今天的天气 people here这里的人们the man downstairs楼下的那个男的 the passage below 下面的这段话20、a little = a bit 修饰形容词、副词 a little = a bit of 修饰不可数名词21、There is an English speech contest next month 用一般现在时表示将来，表示计划或安排好的动作，或者日历、时刻表的规定内容。22、the rest 其余的，可指代可数或不可数名词。 The other(s) 只能指代可数名词23、come up with 提出或提出（答案、方法）等。类似于think of. eg How would you come up with this idea? 你怎样想出这个注意的？ My brother is a person who often comes up with good idea.我弟弟是个常常能想出好点子的人24、offer 提供 offer sb sth 给 offer to sb sth 主动提出干二、短语1、give it to charity 把它捐给慈善机构 2、medical research 医学研究3、What if 如果怎么样？ 4、get nervous 紧张5、take a big exam 参加大考 6、help with 有助于7、in public 在公共场合 8、hardly ever 几乎不9、the whole school 全校 10、without permission 为经许可11、be(make) friends with 与交朋友 12、ask ones permission 请求的允许13、introduceto 把介绍给 14、inviteto do 邀请干15、social situations 社会环境 16、not in the slightest 根本不，一点也不17、right away 立刻，马上 18、all day 全天19、be friendly to 对友好 20、at lunch time 在午饭时间21、a bit shy 有点害羞 22、English speech contest 英语演讲比赛23、represent the class 代表班级 24、come top 名列第一（前茅）25、let down 使失望 26、come up with 提出、想出27、be sure of + n./pron. 28、the rest of the students 其余的学生 be sure to do相信 29、have a lot of experience (in) doing sth be sure +that 从句（在做某事方面有经验）30、deal with 对付，处理 31、come out 出版32、give advice on 在方面提出意见、建议 33、by accident 偶然地，无意之中34、hurry to do sth 匆匆忙忙干35、an internet friend 网友三、句子1、He doesnt know if he should bring a present. 他不知道是否该带礼物。2、You shouldnt worry about what other people say.你不应该考虑别人说什么。3、What will you do if you had a million dollars? 如果你有一百万美元，你会干什么？4、If I were you, I d take a small present.如果我是你，我会带一个小礼物。5、Im too tired to do well.我太累了，没考好。6、Dogs can be a lot of trouble.狗会带来很多麻烦。7、What are you like? 你是什么样的人？8、Id invite him/her to have dinner at my house.我会邀请他（她）到我家吃饭。9、You enjoy the company of other people.你喜欢别人的陪伴。10、I feel nervous talking in front of many people.我在众人面前讲话时感到紧张。11、She always comes top in the school exams.她在学校的考试中总是名列前茅。12、She doesnt want to let her friends down.她不愿让朋友失望。13、If I were you, Ill get out of here.如果我是你，我会离开这里。虚拟语气一、词的语气指我们平常说的说话人说话的口气。（在英语中，语气除了指语调以外，最主要的是通过动词发生变化而表示不同语气）英语中的语气分为三类： 陈述语气（用于陈述句、疑问句、感叹句） 祈使语气（用于祈使句） 虚拟语气（用于条件状语从句、宾语从句等）二、虚拟语气 如果所说的不是事实，而是一种假设、愿望、建议或是一种实现不了的空想，就用虚拟语气。三、虚拟语气在非真实条件状语从句中的用法1、真实条件状语从句与非真实条件状语从句 eg If he doesnt hurry up, he will miss the bus.( 真实条件状语) If he was free, he asked me to tell stories.（真实条件状语） If I were you, I would go at once.（非真实条件状语从句） If there was no air, people would die.（非真实条件状语从句）2、虚拟语气在非真实条件状语从句中的用法及动词形式表示与现在事实相反的情况 （条件）从句谓语动词形式主句谓语动词形式谓语动词用过去式（be用were）should/would/could/might+动词原形eg：If I were you, Id take an umbrella.如果我是你，我会带把伞。（事实：我不可能是你）If I knew his telephone number, I would tell you.如果我知道他的电话号码，我就会告诉你。（事实：不知道）If there were no air or water, there would be no living things on the earth.如果没有水和空气，地球上就不会有生物。(事实：地球上既有空气也有水)If I had any money with me, I could lend you some.如果我带钱了，我就会借给你些。（事实：没带钱）If he studied harder, he might pass the exam.如果他在努力些，就能通过考试了。（事实：学习不用功）表示与过去事实相反的情况从句谓语动词形式主句谓语动词形式Had+过去分词Should/would/could/might+have+过去分词eg If I had got there earlier, I should/could have met her. 如果我早到那儿，我就会见到她。（事实：去晚了） If he had taken my advice, he would not have made such a mistake. 如果他听我的劝告的话，就不会犯这样的错误了。（事实：没有听我的话）表示对将来情况的主观推测（可能相反或可能性很小）从句例句主句 wereIf+主语 didwere to do(通常与一个表示时间状语连用)其 中were to do可能性最小， should+动词原形。 If it rained tomorrow our picnic would be put off.万一那天下雨，我们的郊游就推迟。 should/would do might 主句/could eg: If he would come here tomorrow, I should/would talk to him. 如果他哪天来这儿的话，我就跟他谈谈。（事实：来的可能性很小） If there were a heavy snow next Sunday, we would not go skating. 如果下周日下大雪，我们就不能去滑冰了，（事实：不知能否下雪） If she were to be there next Monday, I would tell her about the matter. 如果她下周一来这儿的话，我就会告诉她这件事得始末。四、虚拟语气的其他用法1、虚拟语气用在wish 后的宾语从句a、表示与现在事实相反的愿望，谓语动词用过去式 eg: I wish I had your brains.我希望我有你那样的头脑。(事实：我根本比不上你)b、表示过去事实相反的愿望，谓语动词：had+v-ed eg: I wish I had known the truth of the matter.我希望我原来知道这件事的真相。（事实：原来不知道）c、表示将来难以实现的愿望 谓语动词：should/would + 动词原形 eg: I wish I should have a chance again.九年级英语Unit4知识点1. if 引导的非真实性条件状语从句 即 虚拟语气 通过动词形式的变化来表示说话人对发生的动作或存在的状态所持的态度或看法的动词形式称为语气，虚拟语气表示说话人所说的话不是事实，而是一种祝愿，建议或是与事实相反的假设等。 If 引导的条件状语从句分为真实和非真实条件句，非真实条件句应用虚拟语气。如果要表示与现在或将来事实相反时，其虚拟语气结构为：句 型条件从句主 句谓语动词形式动词过去式(be动词用were)would+动词原形 即：(从句)if +主语+动词过去式(be 动词用were), 一般过去时(主句) 主语+would+动词原形 过去将来时如：If I had time, I would go for a walk.如果我有时间，我就会去散步。(事实上我现在没有时间) If I were you, I would take an umbrella.假如我是你的话，我会带上雨伞。(事实上我不是你)I would say no if someone asked me to be in a movie. 假如有人请我当电影演员，我会表示拒绝。(事实上瑞没有人请我当电影演员)2. pretend to do sth. 假装做某事 I pretended to sleep just now. pretend +从句 假装 I pretended that I fell asleep.3. be late for 迟到 如： I am late for work/ school/ class/ party.4. a few 与 a little 的区别，few 与 little 的区别 a few 一些 修饰可数名词 a little 一些 修饰不可数名词 两者表肯定意义 如：He has a few friends. 他有一些朋友。 There is a little sugar in the bottle. 在瓶子里有一些糖。 few 少数的 修饰可数名词 little 少数的修饰不可数名词 但两者表否定意义 如：He has few friends. 他没有几个朋友。 There is little sugar in the bottle.在瓶子里没有多少糖。5. still 仍然,还 用在be动词之后，行为动词之前 如： I am still a student.我仍然是个学生 I still love him.我仍然爱他。6. hundred, thousand , million, billion (十亿)词前面有数词或several一词时要不能加s ，反之，则要加s 并与of 连用， 表示数量很多 如：several hundred/ thousand/ million/ billion people几百/千/百万/十亿人 hundreds of trees 上百棵树7. what if + 从句 如果怎么办 ， 要是 又怎么样 如： What if she doesnt come? 要是她不来怎么办？ What if LiLei knows? 如果李雷知道了怎么办？8. add sth. to sth. 添加到 如： I added some sugar to water. 我把糖添加到水里。9. 系动词与形容词连用 get nervous 变得紧张 feel shy 觉得害羞 look friendly 看起来友好10. too +形/副+to do sth. 太而不能 如： Im too tired to stand. 我太累了而不能站。11. help with sth. 如：They help with this problem. help sb. do. 如：They help you relax. 他们帮助你放松12. in public 在公共场所 如:Dont smoke in public. 请不要在公共场所吸烟。13. energetic adj. 活力的如：She is a energetic girl. 她是一个活力的女孩。 energy n. 活力 如：She has lots of energies. 她有活力。14. ask sb. to do 叫做某事 ask sb. not to do sth.叫不要做某事 tell sb. to do 告诉做某事tell sb. not to do sth. 告诉不要做某事如：Teacher asked me to clean the classroom. Teacher asked me not to clean the classroom.15. start doing = start to do. 开始做某事 如： He started speaking/ to speak. 他开始说话。16. borrow sth. from sb. 从某人那里借来某物 如： I borrowed a book from Lily. 我从莉莉那里借来一本书。17.wait for sb.等某人 如：I am wait for him. 我正在等他。18. introduce sb. to sb. 把某人介绍给某人 如： I introduced Lily to Anna. 我把莉莉介绍给安娜。19. invite sb. to do 邀请某人做某事 如： Lily invited me to go to her home for supper. 莉莉邀请我去她家吃晚饭。20. have dinner/ supper 吃晚饭have lunch/ breakfast 吃午餐、吃早餐21. plenty of 修饰不可数名词，也可以修饰可数名词 许多 如： They have plenty of food/ apples. 他们有许多的食物/苹果。22. 给某人某物 give sth. to sb. 如： give an apple to me give sb. sth. give me an apple 给我一个苹果23. get along with sb. 与相处 如：Do you get along well with your friends? 你和你的朋友相处得好吗？24. would rather do sth. than do sth. 表示愿做某事而不愿做某事如： I would rather walk than run.25. whole 整个 26. in fact 事实上27. let sb. down 让某人失望 如： Dont let your mother down. 不要让你的妈妈失望。28. come up with sth. 提出 想出 如： He came up with a good idea. 他提出了一个好主意。 catch up with sb. 追上 赶上 如： Lily caught up with Anna. 莉莉赶上了安娜。29. have experience doing 在做某事有经验 如： I have experience teaching Chinese. 我在教英语方面有经验。30. come out