bunit3知识点梳理

1、v1.0可编辑可修改七年级第二学期牛津英语知识点梳理Unit 3 A visit to Garden City知识点梳理： i词组：1.a visit to Garden City花园城之行2.visit the Li family拜访李家人3.teach maths教数学4.since 1997自从1997年以来5.quite a few相当多，不少6.for several years持续好几年了7.catch thieves抓小偷8.help keep the city safe帮助保护城市安全9.draw plans of buildings绘制建筑蓝图10.design machin

2、es设计机器11.cook food烹饪食物12.bring food (to people)端菜13.grow vegetables种蔬菜14.type letters打字15.answer the phone接听电话16.deliver letters递送信件17.train someone in sport在体育方圆训练某人18.drive a bus驾驶公共汽车19.be in charge of a school负责管理一所学校6第3页共6页在农田里20. in fields21. be used for doing sth.22. tell the time23. key ring

3、24. hold the keys25. take the cable car26. carry people up the hill27. the top of a hill28. have a good timeII.词性转换：1. teach (v.) 教，讲授，训练被用做干某事报时钥匙圈挂钥匙乘缆车运载人们上山山顶过得愉快teacher (n.) 教师Her mother is ateacher and she teachesEnglish. (teach)2. safe (adj.) 安全的，可靠的safely (adv.) 安全地，确实地save (v.) 挽救，节约safety

4、(n.) 安全,We cannot live without water. Pleasesave every drop of water.They arrived in Shanghai safely last night.Here are some safety rules.3. use (v./n.) 使用，应用useful (adj.) 有用的In the past, people used fire to cook food. Now, we can use fire to do a lot of things.Fire is very useful in many ways.4. f

5、arm (n.) 农场，农庄farmer (n.) 农场主；农夫His father is afarmer and he works hard on hisfarm .5. wait （v.） 等待waiter （n.）（ 男）服务员waitress （n.）（ 女）服务员The restaurant is very popular, so lots of people are waitingfor their dishes.The waiters and the waitressesare busing with their work.6. engine n. 引擎，发动机engineer

6、n. 工程师A fireman always drives a fire engine.His father is an engineer.III.语言点/句型：1. A watch is used for telling the time.be used for + doing sth. 意为“被用来做”同时此句还可写成：We use a watch to tell the time. Water can be used for putting out fires = We can use water to put out fires.请记住以下句型：主语（人）use sth. to do

7、相当于 主语（人）use sth. for doing 用某物做某事sth. be used to do 相当于 sth. be used for doing某物被用来做某事IV.语法The present perfect tense现在完成时A.概念及用法：1 .表示过去发生的动作对现在造成的影响或结果。常用词：already、yet、just、ever v1.0可编辑可修改2 .表示过去发生的动作一直延续到现在，而且有可能继续延续下去。此用法中要求动词必须是延续性动词。常用词：since （连接时间的一点） for（连接时间的一段）B.结构：have/has +动词的过去分词（不规则动词的

8、过去分词要专门记忆。教材P102）a) 肯定句：They have already come to Garden City to visit the Li family.b) 否定句：They haven ' t come to Garden City to visit the Li family yet .c) 疑问句:Have they come to Garden City to visit the Li family yetYes, they have./ No, they haven ' t.C. have/has gone to 和have/has gone toh

9、ave/has been to.He has gone to Beijing.have/has been to的区另1J ：某人去了某地（主语不在出发地） 某人去过某地（主语不在目的地） 他去北京了。他去过北京三次了。He has been to Beijing three times.D. have/has been to 和 have/has been in的区另 U：have/has been to强调动作的过程have/has been in强调动作的状态（通常与表示一段时间的时间状语连用）.They have been to Europe once.They have been in

10、 Europe for 10 years.E. already and yetalready用于现在完成时的肯定句中，表示已经，可置于句中或句尾yet用于否定句或疑问句中，常用于句末。.I have already finished my homework.Have you finished your homework yet4第4页共6页v1.0可编辑可修改No, not yet ./ No, I haven ' t finished my homework yet.F. ever and neverever常用于现在完成时，意为at any time ,常用于疑问句中，且可用于含有

11、最高级的句子；never常用于现在完成时，意为 not at any time,可用于含有比较级的句子.Have you ever visited LondonYes, I have./ No, I ' ve never visited it.G. since and for在现在完成时中经常用 since和for连接时间状语，since 所指的是一个时间点，for 所指的是一段时间。该用法强调动作的延续性，因此句中的谓语动词必须是延续性动词。a) since+ 时间的一点：since作介词+时间点(since 1997)since作连词，引导时间状语从句，从句中动词需用一般过去时。.

12、She has been a teacher since 1997.1 haven' t heard from her since she lived there.b) for+ 一段时间：.She has been a teacher for quite a few years.c) He has learned Chinese for 7 years. / He has learned Chinese since 7 years ago.对for及since连接的时间状语提问均用how longf How long has he learned Chinesed) 短暂性动词不可出现在含有since/ for的现在完成时。如需使用，则要转换为表示延续性状态的动词。My fatherhas become an engineer for 5 years.应改为：