新版新目标英语八年级下册unit3知识点总结

Unit 3 Could you please clean your room?Section A 1.Could you please do sth ?用于提出请求，希望得到对方肯定回答，语气较委婉。肯定回答：Sure./ Of course./ Certainly./No problem.否定回答：Sorry , I cant. / Im afraid I cant.在表示请求帮助或请求允许的疑问句中，常用could代替can，以表示礼貌，委婉或不确定的语气，而can 则不具备这些语气。这种情况下不能把 could 看作 can 的过去式。以上两句中用 could 是为了表示礼貌的请求。表示请求帮助或请求允许时，除了 can, could 之外，还可以用 may，句子的表达方式也各有不同，可以用不同的方式来表示同一个概念。Could / Can / May I use your car for a day? 作允答可以各种各样： 如同意可以说 Yes，或 Sure 或 Certainly，还可说 Yes, (do) please. 或 Of course. (you may / can). 或 Thats OK / all right. 如果不同意，可以说 Im sorry you cant. 或 Im really sorry, but I have to use it today. 要避免说 No, you cant. 这样显得很不礼貌。否定回答通常用委婉语气。2. take(1)取，拿：Please take some books to the classroom.(2)吃，喝，服用 Take some medicine.(3)乘车，船等 We can take a bus to the park.(4)花费（时间、金钱） It took me 2 hours to do my homework. take care of 照顾 take a walk 散步 take awa拿 take up占据 take place 发生 take off脱下； take ones time慢慢来3.problem question 问题 problem客观存在待解决的问题，侧重困难。Solve the problem question因存疑而提出问题，侧重疑惑。 answer the question4.(1)neither adv 也不 句子须部分倒装。此时可用nor替换 neither Idontlikethisdress.我不喜欢这件连衣裙。 Neither/NordoI.我也不喜欢。【注意】肯定句：He likes beef.-So do I. 我也喜欢。(2) neither nor 既不也不, 连接两个词做主语，谓语动词就近原则 Neither Tom nor I am a student(3) neither 作代词表示“两个都不”，它作主语时，谓语动词常用单数。Neither of my parents is at home.辨析 also, too, either, neither (1)also 较正式，在句中位于行为动词前，系动词、助动词或情态动词之后。 Peter also likes beef. I am also a student. She can also swim.(2)too较口语，多用在肯定句句末。(3)either 表示“也”时，一般只用于否定句句末。 I dont have much money either.(4)neither 用作副词，意为“也不”解释，句子须采用部分倒装。 also和too常用于肯定句，neither用于否定句； either表示“也”用于否定，但eitheror用于肯定。5.or 否定句 也不 We dont have tea or coffee. 陈述句 或者 Answer me yes or no. 疑问句 还是 Do you like red or pink? 表转折 否则 祈使句 Hurry up, or you will be e over 过来 come across（偶然）发现 come back回来 come up with想出 come true实现 come from来自 come on加油 come in/into进入,进来 come out出来，(花)开，(照片)冲洗出来7. surprise(1) in surprise 惊奇地 惊讶地 He look at me in surprise.(2)可数名词，令人惊奇的事或物 That is a big surprise. (3)不可数名词 惊奇 to ones surprise To my surprise, he didnt leave. (4)及物动词，使惊奇 surprise sb His success surprised us.8. work on 从事，忙于 work at 学习、致力于、在上下工夫9. borrow some money 借一些钱 borrow sth. from sb. 向某人借某物(借入)=borrow sb sth lend sb. sth.= lend sth. to sb. 借给某人某物(借出) You can borrow some money from your brother. 你可以向你哥哥借些钱。 Can you lend me your bike?你能借给我你的自行车吗？注意： keep 延续性动词 I can keep the book for one week.10. pass sb sth=pass sth to sb地给某人某物11.need v 需要作实义动词常用于肯定句(1)人做主语，sb. need to do sth 某人需要做某事(2)物做主语，sth need doing = sth need to be done need做情态动词用于否定句或疑问句.(1)neednt = dont have to 没有必要(2)need ,must 引导的一般疑问句，肯定回答用must,否定回答用neednt Must I go there now?Yes，you must/No, you needntSection B1.invite v invitation n邀请(1) invite sb. to do sth 邀请某人做某事(2)invite sb. to +地点 邀请某人去某地2.waste (1) v 浪费 waste time/money on sth waste time / money (in) doing sth 在做某事上花费时间/金钱 (2) n 不可数 浪费 废物 垃圾 a waste of 浪费 a waste of time 浪费时间 a waste of money 浪费金钱 (3)adj 浪费的 无用的 荒废的 waste paper 3.spend/pay/cost/take 花费(1)spendspentspent v 花费,主语是人 sb.+ spend +时间/钱+on sth 在某事上花费.sb. +spend +时间/钱+（in） doing sthspend on= pay for 支付He spends too much time on the computer games.(2) pay paid paid v 支付，主语是人 sb.+ pay + 钱+for sth I pay 10 yuan for the book.(3) cost cost cost v 花费，主语是某物或某事 sth cost sb. +钱 某物花费某人多少钱 A new computer costs me a lot of money.(4)taketook taken v 花费It takes /took sb. some time to do sth. 做某事花费某人多长时间It takes him 3 hours to do his homework.4.in order to 目的是；为了 后接动词原形 句首 句尾都可以 in order to do sth 为了做某事5.provide v 提供 为应急等做好准备而提供； 供给 provide sth. for sb. 为某人提供某物= provide sb. with sth.(1)offer侧重表示愿意给予 offer sb. sth. = offer sth to sb. 对某人提供某物 offer to do sth 主动提出干某事(2) supply定期供应, 强调替代或补充所需物品 supply sb. with sth=supply sth. to sb. 为某人提供某物6. depend on 依靠；信赖 It all depends.=That depends. 视情况而定7. since conj. (1)由于，因为，既然 引导原因状语从句 (表示对方已知的事实或理由，常放在句首） Since we dont have money,we cant buy a house. (2)自.以后，自.以来 引导时间状语从句 Its two years since we visited your mother.8.keep +sth /sb. +adj. 使.处于某种状态 keep 系动词 保持 keep + adj . We must keep healthy. 实义动词 保持；继续 (1) keep ( on ) doing sth 继续做某事 He was in great pain but he kept on working (2) keep sb. doing sth 让某人一直做某事 Im sorry to have kept you waiting for so long. 9. as a result 结果 因此 （插入语，放在句首，用逗号隔开） as a result of 由于.，作为.的结果 10. the + 比较级， the + 比较级 越. 越. The faster, the better.11. independent adj 独立的，自主的12. make made made v. 做， 制作， 使得(1) make sb/sth + 形容词 让某人或某物 make you happy(2) make sb/sth do sth 使某人做某事 make me laugh. make sure 确信 make a dialogue编对话 make a mistake犯错误(by mistake由于疏忽) make a noise吵闹 make faces做鬼脸 make friends (with)和.交朋友 make room for给.让地方 make tea沏茶 make money赚钱 make a decision作出决定 make the bed 整理床铺 make a living 谋生 make fun of = laugh at 取笑 13. have time to do sth.有时间做某事 have time =be free 有空14. get into =enter 进入 get up 起床 get back 返回 get over 克服 get dressed穿衣 get into进入 get/be lost丢失 get off/on下/上车 get on well with sb.与某人相处得好 get out of从出来 get warm 变暧 get ready for +n.为做准备 get ready to do sth.准备做某事 get well康复 get a chance 有机会、得到机会 get/go to sleep(fall asleep)入睡 相关：(be asleep睡着) 15.get older 长大 get/ become/ go辨析：(1)get+adj较多地与形容词比较级连用 The days are getting longer and longer.(2)become 强调变化的结果 Its becoming colder and colder.(3)go+adj. 表示令人不快的事情 go bad变坏，go blind变瞎，go hungry挨饿16. do ones part 尽职责；尽本分 do ones part in doing sth 在做某事上尽职责17.develop independence 培养独立意识 develop vde