1、Unit 4 Astronomy：the science of the stars 菜 单 英语必修3.重点词汇 1.violent adj.猛烈的；激烈的；强暴的 _ n.暴力 violently adv.猛烈地；激烈地 例如：There was a violent storm yesterday,whichcaused buses to be late.昨天一场猛烈的暴风雨，造成公交车迟到。单元小结重点回顾 violenceUnit 4 Astronomy：the science of the stars 菜 单 英语必修3 2.in time _ on time 按时 at one ti
2、me 曾经，一度 at a time 每次，一次 at times 有时 in no time 立刻，马上 ahead of time 提前 at the same time 同时 all the time 一直，始终 例如：Will we be in time for the six oclockconcert?我们来得及赶上六点钟的音乐会吗？及时；终于Unit 4 Astronomy：the science of the stars 菜 单 英语必修3 3.harmful adj._ harm n.害处 vt.伤害，损害 harmless adj.无害的 be harmful to sb.
3、/sth.do harm to sb./sth.dosb./sth.harm 对某人/某事有害 例如：Eating a large amount of sweets is harmfulto your teeth.吃太多的糖对你牙齿有害。有害的Unit 4 Astronomy：the science of the stars 菜 单 英语必修3 4.exist vi.存在；生存 _ n.存在；生存 come into existence 形成；出现 There exists.有 例如：The idea exists only in the minds of thosewho are gener
4、ous.这种想法只有那些慷慨的人才有。existenceUnit 4 Astronomy：the science of the stars 菜 单 英语必修3 5.give birth to _ at birth 出生时 by birth 天生，生来 be of good/noble birth 出身名门 bring.to birth 使产生 例如：His wife gave birth to a healthy baby boy.他的妻子生了个健康的男婴。产生；分娩Unit 4 Astronomy：the science of the stars 菜 单 英语必修3 6.prevent.fr
5、om 阻止；制止 同义词组：stop.from,keep.from 例 如：Trees on mountains can prevent soil(from)being washed away.山上的树木能够阻止土壤被冲走。Unit 4 Astronomy：the science of the stars 菜 单 英语必修3 7.puzzle n.谜；难题 vt.&vi.(使)迷惑；(使)为难 puzzle about/over 仔细琢磨 puzzle out 琢磨出答案 _ adj.感到迷惑的 _ adj.令人困惑的 例如：They are puzzling about the proble
6、m.他们正在琢磨那个问题。puzzledpuzzlingUnit 4 Astronomy：the science of the stars 菜 单 英语必修3 8.now that _ 例如：Now that we have the chance to improveourselves,we should make good use of it.既然我们有机会来提高我们自己，那我们就好好利用它吧。既然Unit 4 Astronomy：the science of the stars 菜 单 英语必修3 9.break out 突发；爆发 break up 解散；破碎；结束 break thro
7、ugh 突破 break away from 脱离 break down 出故障；垮掉 break in 闯入 break into 闯入；强行进入 例如：A fire broke out on Sunday afternoon atthe scene of the explosion.星期日下午在爆炸现场发生了火灾。Unit 4 Astronomy：the science of the stars 菜 单 英语必修3 10.watch out for 密切注意；当心；提防 watch out 小心 watch out(for)look out(for)例如：Watch out for the
8、 young man who iswatching you.提防那个一直注视着你的人。Unit 4 Astronomy：the science of the stars 菜 单 英语必修3.重点句型 1.As a result of this,many scientists believe theearth may become_.许多科学家认为地球可能会因此变得太热而不适合生物生存。答案 too hot to live on Unit 4 Astronomy：the science of the stars 菜 单 英语必修3 2.But when I tried to step forwa
9、rd,I found I wascarried_on the earth and fellover.但是当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。答案 twice as far as Unit 4 Astronomy：the science of the stars 菜 单 英语必修3 3.walkingdoesneedabitofpractice_gravity has changed.重力改变了，看来走路也的确需要练一练了。答案 now that Unit 4 Astronomy：the science of the stars 菜 单 英语
10、必修3.重点语法 Noun clauses as the subject主语从句 1._it was to become was uncertain untilbetween 4.5 and 3.8 billion years ago when the dustsettled into a solid globe.答案 WhatUnit 4 Astronomy：the science of the stars 菜 单 英语必修3 2._many scientists believe is that thecontinued presence of water allowed the earth todissolve harmful gases and acids into the oceans andseas.3.So_life will continue on the earth formillions of years to come will depend on whether thisproblem can be solved.答案 2.What 3.whether