人教版必修三unit4vocabularyPPT演示课件

1、1unit4 words2group 1:topic-related words1. write down the main gases(气体） in the atmosphere(大气层）2. different kinds of animals 3. different kinds of scientists3group 2: phrases1.write down 6 phrases with “time”2.write down 6 phrases with “turn” 3.write down 6 phrases with “break” requirement: widely u

2、sed phrases4group 3:prefix and suffix(前缀或后缀）1.find out 6 words with “en” or “en”2.find out 6 words with “-less” 3.find out 6 words with “un-”5group 41.find out as many pairs of words as possible (eg: religion- religious)2.conclude the phrases in this unit6group 1:topic-related words 1. write down th

3、e main gases(气体）in the atmosphere(大气层） 2. different kinds of animals 3. different kinds of scientists71.the gases in the atmosphere oxygen（氧） nitrogen （氮） rare gases（稀有气体） carbon dioxide（二氧化碳） vapour（水蒸汽）other matters (物质)：酸acid， 碳carbon, 原子atom8地球大气地球大气the earths atmospherenitrogenoxygendioxidecarb

4、onvapour 9 2. different kinds of animals shellfish 水生有壳动物amphibian 两栖类动物reptile 爬行类动物mammal 哺乳动物 can you give them a right order according to its development? can you give us 2 examples for what is shellfish , amphibian, reptile and mammal?10 3. different kinds of scientists physicist 物理学家 biologist

5、 生物学家 geologist 地质学家 chemist _ artist _ can you write out the original form of these words?化学家艺术家11group 2: phrases1.write down 6 phrases with “time”2.write down 6 phrases with “turn” 3.write down 6 phrases with “break” requirement: widely used phrases121.the phrases with “time”1）in time2）on time 3）

6、from time to time4）for the first time 5）at one time 6）at a time7）at times8）at no time9）in no time及时，终于，迟早及时，终于，迟早按时按时不时地不时地第一次第一次曾经，一度曾经，一度每次每次间或，偶尔间或，偶尔绝不，从来没有绝不，从来没有立即，马上立即，马上= soon132. phrases with “turn”1) in ones turn 2) turn out3) turn up4) turn to 5) turn down6) turn on7) turn off8) take turn

7、s to do9) turn in= hand in1)轮到某人轮到某人2） 结果是结果是3）出现，调大）出现，调大4）转向）转向5）拒绝，调小）拒绝，调小6）打开）打开7）关上）关上8） 轮流做某事轮流做某事9）上交）上交143. phrases with “break”1) break out2) break in3) break down4) break off5) break up6) break away from1)爆发爆发2）闯入，插嘴）闯入，插嘴3）崩溃，瓦解，出故障）崩溃，瓦解，出故障4）中断）中断5）分解）分解6）挣脱）挣脱15group 3:prefix and suff

8、ix(前缀或后缀）1.find out 6 words with “en” or “en”2.find out 6 words with “-less” 3.find out 6 words with “un-”161. words with “en” or “en” 使 (adj.-v.) less-lessen 1.wide-_ 2.sharp_3.short_ 4.weak-_5.deep-_ 6.large-_7.rich-_ 8.able-_do you know the chinese meaning of the above words? v. 减少，减轻减少，减轻deepens

9、harpenshortenweakenwidenenlargeenrich enable 17后缀后缀-less（否定意义）（否定意义）(noun-adj.)weight-weightless-weightlessly1.end- 2.care-3.use- 4.hope-5.penny- 6.job-7. home-2. words with “-less”do you know the chinese meaning of the above words?endlesscarelessuselesshopelesspennilessjoblesshomeless183.words with

10、 “un-”前缀前缀 un（否定意义）（否定意义）likeunlike1.believable-unbelievable 2.certain-uncertain 3.luckily-unluckily 4.willingly-unwillingly5.dress-undress v. 脱衣服脱衣服 6.cover-uncover v.揭开揭开,揭穿揭穿,揭示揭示 do you the chinese meaning of the above words?19group 4 1.find out as many pairs of words as possible (eg: religion-

11、religious) 2.conclude the phrases in this unit201.pairs of words noun-adjective1.religion-religious2.globe-global3.violence-violent4.presence-present5.harm-harmful6.extinct-extinctive-extinction7.fundament-fundamental8.weight-weightless-weightlessly21verb-noun1.pull-pull2.float-float3.puzzle-puzzle2

12、.conclude the phrases in this unit22phrases in this unit:1.solar system2. in time3.give birth to4.in ones turn5.preventfrom6.block out7.cheer up8.now that9.get the hang of10.break out11.watch out12.lay eggsa.下蛋下蛋b. 产生，分娩产生，分娩c. 感到高兴感到高兴d. 当心，提防当心，提防e . 爆发爆发f. 既然既然g. 熟悉，掌握，理解熟悉，掌握，理解h. 挡住（光线）挡住（光线）i.

13、 阻止，制止阻止，制止j.轮到某人轮到某人k. 及时，终于，迟早及时，终于，迟早l. 太阳系太阳系 lkbjihcfgeda23 now that同同since相似相似, 语气较弱语气较弱, 强调人们强调人们已知的事实。已知的事实。既然你忙既然你忙, 就让我给你做吧。就让我给你做吧。now that you are busy, let me do it for you.既然人都齐了既然人都齐了, 咱们开始干吧。咱们开始干吧。now that everyone is here lets start work2425fundamentalnfresh air is fundamental to good health.n新鲜空气对健康是不可缺少的。新鲜空气对健康是不可缺少的。nso, one of the fundamental problems in medicine is that you and i, and all of us, we go to our doctor once a year.n所以医学上一个根本的问题是你和我所以医学上一个根本的问题是你和我,以及我们所有的人以及我们所有的人,我们一年看一次医我们一年看一次医生。生。26multiply1.乘, 相乘 one can make 18 by mult