B Unit知识点梳理

1、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. desi

2、gn machines 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 在体育方面训练某人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20. in fields 在农田里21. be used for doing sth. 被用做干某事

3、22. tell the time 报时23. key ring 钥匙圈24. hold the keys 挂钥匙25. take the cable car 乘缆车26. carry people up the hill 运载人们上山27. the top of a hill 山顶28. have a good time 过得愉快II. 词性转换：1. teach (v.) 教, 讲授, 训练 àteacher (n.) 教师 Her mother is a teacher and she teaches English. (teach)2. safe (adj.) 安全的, 可靠

4、的 àsafely (adv.) 安全地, 确实地 àsave (v.) 挽救,节约 àsafety (n.) 安全, We cannot live without water. Please save every drop of water. They arrived in Shanghai safely last night. Here are some safety rules. 3. use (v./n.) 使用, 应用 àuseful (adj.) 有用的 In the past, people used fire to cook food.

5、Now, we can use fire to do a lot of things. Fire is very useful in many ways.4. farm (n.) 农场, 农庄 àfarmer (n.) 农场主; 农夫His father is a farmer and he works hard on his farm.5. wait (v.) 等待 àwaiter (n.) (男)服务员àwaitress (n.) (女)服务员 The restaurant is very popular, so lots of people are wait

6、ing for their dishes. The waiters and the waitresses are busing with their work.6. engine n. 引擎，发动机 àengineer 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.Ø be used for + doing sth. 意为“被用来做”Ø 同时此句还可写成：We us

7、e a watch to tell the time.e.g. 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 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：a

8、lready、yet、just、ever2.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 havent come to Garden City to visit the Li family yet .c) 疑问句: Have they

9、 come to Garden City to visit the Li family yet?Yes, they have./ No, they havent.C. have/has gone to 和 have/has been to的区别：have/has gone to 某人去了某地（主语不在出发地） have/has been to 某人去过某地（主语不在目的地）e.g. He has gone to Beijing. 他去北京了。 He has been to Beijing three times. 他去过北京三次了。D. have/has been to 和 have/has

10、been in 的区别： 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）e.g. They have been to Europe once. They have been in Europe for 10 years.E. already and yet already 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。e.g. I have already finished my homework. Have you finished your homewor

11、k yet? No, not yet./ No, I havent finished my homework yet.F. ever and never ever 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e.g. Have you ever visited London? Yes, I have./ No, Ive 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

12、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。e.g. She has been a teacher since 1997.I havent heard from her since she lived there.b) for+一段时间 ：e.g. 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 long How long has he learned Chinese?d) 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。e.g. My father has become an engineer for 5 yea