人教版高中英语必修三unit4-Astronomy-language-points(共31张课件.ppt-(课件无音视频)

1、Unit 4Unit 4 Astronomy:Astronomy:the science of the starsthe science of the starsLanguage Points 1.system:n.系统系统,体系体系,制度制度,体制体制 a.political system 政治体制政治体制 puter system 电脑系统电脑系统 2 theory:n.学说，理论学说，理论.in theory 理论上理论上 in practice 实际上实际上Your plan is good in theory,but it doesnt work in practice.3.viol

2、ent:a.暴力的暴力的,激烈的激烈的 violence:n.a.violent pain b.a violent young man.c.family violence 家庭暴力家庭暴力4.in time:及时及时=not late “迟早迟早;最后最后”Eg.Dont worry.Everything will get better in time.别着急别着急,我肯定事情最终会好转的。我肯定事情最终会好转的。in time 及时；总有一天；终于in no time立刻立刻，马上，马上on time 按时at one time 曾经，一度一度at a time 一次一次，同时同时at ti

3、mes 有时有时at no time 决不决不，在任何时候都不在任何时候都不5.atmosphere n.大气层大气层;气氛气氛 a.指指“大气层大气层”时时,常用常用 the atmosphere;b.指指“气氛气氛”时时,常使用单数形式。常使用单数形式。Eg.in the atmosphere 在大气层里在大气层里 a friendly atmosphere.友好的氛围。友好的氛围。6.unlike a.prep.不同；不像不同；不像 b.Adj.(作表语）不相似，作表语）不相似，不同的不同的 Unlike her brother,Su Shi is very opitimistic.Th

4、ey are twins,but they are unlike in character.拓展拓展:unlikely adj 不可能不可能 It is unlikely that she failed the exam.易易 错错 点点 拨拨 unlike/dislike/alike/likely(1)unlike prep.不同；不像不同；不像(2)dislike vt.不喜欢不喜欢(3)alike adj.相似的相似的，同样的同样的(4)likely adj.很可能发生的很可能发生的，有希望的有希望的 （unlikely adj.不可能）不可能）应用应用用用 unlike,dislike

5、,alike,likely的适当形式填空：的适当形式填空：(1)The twins look very much _.(2)_ his brother,he _ playing football.(3)We all think he is _ to win.alike/unlikeUnlikedislikeslikely7.Harmfulbe harmful to 对对有害有害do sb.harm=do harm to sb.对某人有害对某人有害do more harm than good 弊大于利弊大于利There is no harm in doing sth.做某事无害处做某事无害处。8

6、Chain a gold chain 金链子金链子 a chain of 一系列，一系列，一连串一连串 chain store 9.a.multiply乘乘 A multiplied by B is Four multiplied by seven is twenty-eight.7乘乘4等于等于28 b.multiply v.增加增加 We must multiply our efforts to do sth 我们必须加倍努力做我们必须加倍努力做The naughty boy _ to me that the hen（母（母鸡）鸡）that _ there just now had _ t

7、wo eggs the day before.A.laid;laid;laid B.laid;lay;lainC.lied;laid;lain D.lied;lay;laid10.by laying eggs.lay-laid-laid-laying 放放,把把放在放在；产卵；产卵eg:He laid his books on the desk.D注意注意:lie(lied;lied;lying)说谎说谎 lie(lay;lain;lying)躺；位于躺；位于 11exist vi.存在；生存；维持生活存在；生存；维持生活 n.existence n.存在，生存存在，生存There exist

8、s/existed.某地有某地有exist on 靠靠为生为生come into existence 开始存在；成立开始存在；成立12in ones turn 轮到某人；接着轮到某人；接着in turn 依次；轮流；转而；反过来依次；轮流；转而；反过来by turns 轮流；交替轮流；交替take ones turn 轮到某人做轮到某人做了了take turns 依次；轮班依次；轮班，轮流轮流即学即练即学即练(1)The girls called out their names _ _.那些女孩儿逐一报出了自己的名字那些女孩儿逐一报出了自己的名字。inturn(2)We kept watch

9、_ _.We _ _ to keep watch.我们轮流守望我们轮流守望。byturnstookturns prevent sb.(from)doing sth.stop sb.(from)doing sth.keep sb.from doing sth.13.prevent.from 使使.不做某事不做某事,阻止阻止.做某事做某事(1)What can we do to _ this disease _ _？我们能做什么来防止？我们能做什么来防止这种疾病蔓延呢？这种疾病蔓延呢？(2)Dont _ others _ for long.不要让别不要让别人等太久人等太久。prevent/stop

10、/keepfrom spreadingkeepwaiting No one can prevent the plans _ out.A.to be carried B.from carryingC.not to carry D.from being carried14.cheer up 感到高兴；感到振奋感到高兴；感到振奋 sth cheer sb.up 使某人高兴；使某人振奋使某人高兴；使某人振奋cheer on sth 为为加油加油Cheers!干杯！祝你健康！干杯！祝你健康！(用于祝酒用于祝酒)1)_ _！The news isnt too bad.振作一点吧！也不是什么太坏的消息振作一

11、点吧！也不是什么太坏的消息。(2)Every time an English runner won a race,the crowd _.每次英国选手赢得赛跑冠军每次英国选手赢得赛跑冠军，观观众就欢呼众就欢呼。(3)The crowd _ their favourite horse _.观众都替他们看好的马加油观众都替他们看好的马加油。Cheer upcheeredcheeredon15watch out(for)look out(for)密切注意；密切注意；留神留神watch over 照看；看守照看；看守 Watch out for cars when you cross the road

12、.Would you mind watch over my bag when I go to the rest room?.单词拼写单词拼写1He was interested in a_ and always stayed up at night to watch the stars.2Not long ago a v_ earthquake occurred off the coast of Indonesia.3Computer hackers have broken down security s_，raising questions about the safety of infor

13、mation.4Too much sugar can be h_ to childrens teeth.astronomyviolentsystemsharmful5The threestar hotel offers a friendly a_ and personal service.6China has sent up another _(人造卫星人造卫星)into space.7There is a lot of rubbish _(漂浮漂浮)on the surface of the river.8_(理论理论)is based on practice.9The_(气候气候)is d

14、ifferent from place to place.10.6 _(乘乘)by 5 is 30.atmospheresatellitefloatingTheoryclimatemultipliedPut the following sentences intoChinese:1.What it was to become was a mystery until the dust began to slowly combine into a ball moving around the sun.随后它会变成什么随后它会变成什么曾经是一个谜，直曾经是一个谜，直到最后这团尘埃开始慢慢地合成一个到

15、最后这团尘埃开始慢慢地合成一个环绕太阳运转的环绕太阳运转的球状物。球状物。2.The problem was that the earth became violent because it was not clear whether the solid shape was to last or not.问题是地球（开始）变得问题是地球（开始）变得激烈动荡激烈动荡，不知道这个固体形状不知道这个固体形状是否会继续存在是否会继续存在下去下去。3.It allowed the earth to dissolve harmful gases,which had become part of the e

16、arths atmosphere,into the oceans and seas.它使得地球得以把它使得地球得以把曾经存在于大气曾经存在于大气层中的有害气体，溶解在海洋里。层中的有害气体，溶解在海洋里。4.Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.在未来的千百万年中在未来的千百万年中，生命能否在，生命能否在地球上延续将取决于这个问题能否地球上延续将取决于这个问题能否得到解决。得到解决。Homework1.Collect more information about the development of life and make a poster with your group members.2.Read and retell the passage to learn the important and difficult language points.