(精品)必修三Unit4thescienceofthestars

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1、Unit 4 Astronomy: the science of the stars单元要点预览词汇部分词语辨析1. loudly / loud / aloud 2. unlike / dislike 3. remain / leave4. climate / weather 5. now that / since / because / as 词形变化1. violent adj.强暴的，猛烈的violence n.暴力，强暴；猛烈violently adv. 强暴地；猛烈地2. fundamental adj.基本(础)的n.pl.基本原则(法则) fundamentally adv. 基

2、本地；根本地 fundament n. 基础；根本3. development n.生长，发展；新情况develop vt.发展；产生 vi.生长；发展developed adj. 发达的developing adj. 发展的4. lay vt.放下；摆设；产(蛋) lay-laid-laid-layinglie vi. 躺，平放；位于lie-lay-lain-lyinglie n.&vi. 谎话；说谎lie-lied-lied-lying5. prevent vt. 预防，防止prevention n.预防；阻止；妨碍preventable adj.可防止的，可预防的6. gentle ad

3、j.和蔼的；轻柔的gently adv.温和地；静静地7. physics n.物理，物理学physicist n.物理学家physical adj.身体的；物理(学)的；物质的 重点单词 1. system n.c 系统；体系；制度；方法 2. lay vt. (laid, laid, laying) 把放下；摆设；铺(地毯) ；产(蛋)3. harmful adj. 有害的；伤害的 4. exist vi. 存在；生存 5. puzzle v.(使)迷惑；(使)苦思 n.谜；难题6. pull v.拉，拖，拔；移动 n.拉，拖；拉(引)力7. cheer vt.&vi. (使)高兴、振奋；

4、(对)欢呼 重点词组1. to begin with 以开始；由作为开头；首先2. in time 及时；最终；迟早3. in one s turn 轮到某人；接着4. prevent.from 使不做事；阻止做某事5. block out 挡住（光线）6. be off = set off 出发；动身；不用上班/学/开张7. break out (灾难、战争等)突发；爆发8. watch out 密切注视；当心；提防 重点句子1. It exploded loudly with fire and rock, which were in time to produce the water va

5、pour, carbon dioxide, oxygen, nitrogen and other gases, which were to make the earth s atmosphere.2. That made it possible for life to begin to develop.3. But when I tried to step forward I found I was carried twice as far as on the earth and fell over.重点语法宾语从句和表语从句（见语法部分）语言要点 .词语辨析 1. loudly / loud

6、 / aloud【解释】loudly adv 响亮地，高声地 loud adj/adv 与sing, speak, talk连用aloud adv 相对默读而言；出声【练习】根据句子的意思在括号里填入适当的词。1). Will you please speak _? 2). It is good for you to read English _ every morning. 3). The bomb exploded _.4). Is her voice _ enough ?5). Action speaks _ than words (事实胜于雄辩). Keys: 1). louder 2

7、). aloud 3). loudly 4). loud 5). louder2. unlike / dislike【解释】unlike prep. 不像，和不同 adj. 作表语 不相似；不同dislike vt./n. 不喜爱，厌恶【练习】根据句子的意思在括号里填入适当的词。1). A good hotel manager should know his regular guests likes and _.2). Her latest novel is quite _ her earlier work.3). If you go on like that you ll get yours

8、elf _ (like).4). I was very interested in the lecture, _ many of the students.Keys: 1). dislikes 2). unlike 3). disliked 4). unlike3. remain/leave【解释】remain vi. 仍然是；留下；剩下常用句型：remain + n. 仍然是 remain + adj./adv./prep. 仍然是remain + v-ed/v-ing 仍然是 remain to be done有待去做，依然要做leave vt. 剩下，忽略或未拿或未带（某物），使或让（某

9、人、事物）处某状态某地等常用句型：leave sb. sth. / leave sth. to sb. 给某人留下某物leave sth (for sb) 留下，交待下(某物) leave sth to sb 将某物遗赠给某人remaining/left两者都可以作形容词，表示“剩下的”，前者用于被修饰的名词之前，后者用于被修饰的名词之后。【练习】根据句子的意思在括号里填入适当的词。1). Someone _ you this note while you were out. 2). After the earthquake, little _ of the village.3). He us

10、ed the _ money to buy a dictionary.4). After buying the dictionary, he had not much money_. 5). Arriving home, I found that I d _ my key in the office. 6). Don t leave her _ (wait) outside in the rain. 7). She remained _ (change) after all these years.8). A great many things remain _ (do). Keys: 1).

11、 left 2). remained 3). remaining 4). left 5). left 6). waiting 7). unchanged 8). to be done4. climate / weather【解释】climate指从长时间的范围来看某地的平均气候或经常性的气候；weather指某地一时的天气，如寒暖、晴雨和干湿的变化情况。【练习】根据句子的意思在括号里填入适当的词。1). We shall go out for a picnic tomorrow if the _ is fine.2). A drier _ would be good for your heal

12、th.3). I couldnt imagine what it would be like to live in a hot _. 4). The _ of our country is mild, but individual places experience bad _. Keys: 1). weather 2). climate 3). climate 4). climate; weather5. now that / since / because / as【解释】都可引导原因状语从句，语气最强的是because，引导直接而明确的原因，也用来回答why的问句或用于强调句型；其次是s

13、ince/now that，表示已知或明显的原因，再次是as，引导的原因是不言而喻、显而易见的；for引导的是并列分句，表推测或判断的原因，前面有逗号隔开。【练习】根据句子的意思在括号里填入适当的词。1). _ everybody is here, lets begin our meeting. 2) It was _ he was ill that he didn t go to school. 3). It must have rained last night, _ the ground is all wet.4). _ we are alone, we can speak freely

14、.Keys: 1). since/now that 2). because 3). for 4). Now (that).词性变化（见上面表格）.重点词汇1. system n.c 系统；体系；制度；方法 systematic adj 有系统的; 有条理的典例 1). The solar system includes the sun and its eight planets. 太阳系包括太阳和它的八颗行星。2). Alcohol is bad for your system. 喝酒对身体有害。练习 根据句子的意思完成句子。1). The _ _ (教育系统) operates very d

15、ifferently in the US and China.2). He introduced us a well-designed _ _ (铁路系统).Keys: 1). educational system 2). railway system 2. lay vt. (laid, laid, laying) 把放下；摆设；铺(地毯) ；产(蛋)典例1). He laid his hand on my shoulder. 他把手放在我的肩上。2). Who should we lay the blame on? 我们该责备谁?重点用法 lay短语：lay eggs 下蛋 lay sth.

16、 aside 把某物放在一边；积蓄（钱）lay sth. down 把某物放下 lay the blame on sb.责备某人lay the table 摆桌子lay emphasis / stress on sth. 把重点放在某事上练习 根据句子的意思在括号里填入适当的词或翻译。1). The bird _ its eggs in other birds nests. 2). He is a political leader that _ _ _ _ (非常强调) individual responsibility. 3). He _ some money _ for rainy day

17、s. Keys: 1). lays 2). lays great stress on 3). lays/puts; aside 3. harmful adj. 有害的；伤害的 harm n.&vt. 伤害（某人） 典例Many people are aware of the harmful effects of smoking. 很多人都意识到吸烟的危害。重点用法be harmful to sb./sth. 对有害do harm to sb.= do sb. harm = harm sb. 对有害；伤害练习 根据句子的意思在括号里填入适当的词或翻译。1). Everyone knows tha

18、t smoking is _ to your health.2). In many cases, too much care for children from parents might even do _ to their growth.3). 在阳光下看书对你的眼睛伤害很大。_ Keys: 1). harmful 2). harm 3). Reading in the sun does a lot of harm to your eyes. = Reading in the sun does your eyes a lot of harm.= Reading in the sun is

19、very harmful to your eyes. 4. exist vi. 存在；生存 existence n. 存在典例1). Does life exist on Mars? 火星上有生命吗? 2). I can hardly exist on the wage I m getting. 我靠我挣的工资简直难以餬口。重点用法exist + prep. 存在于地方exist on sth. 靠某物生存 练习 用exist的短语或其适当形式填空。1). This plant _ only _ Australia. 2). Can you _ _ such a low salary?3).

20、I doubt the _ (exist) of alien.Keys: 1). exists; in 2). exist on to 3). existence5. puzzle vt.&vi. (使)迷惑；(使)苦思 n.谜；难题 puzzled adj.无法了解的；困惑的 puzzling adj.令人费解的典例1). Her reply puzzled me. 她的回答把我弄糊涂了。 2). Their reason for doing it is still a puzzle to me. 他们为什麽要做此事我仍莫名其妙。重点用法sth. puzzles sb. 某事使某人迷惑/为难

21、sb. be puzzled by sth. 某人对感到迷惑puzzle about/over sth. 对某事感到迷惑或苦苦思索（以便理解）puzzle one s brain苦思苦想；绞尽脑汁solve a puzzle 解决一个难题练习 用puzzle的适当形式填空或翻译。1). To explain the _ (puzzle) findings, he offers two theories. 2). I _ (puzzle) that I haven t heard from Liz for so long.3). She listened with a _ (puzzle) ex

22、pression on her face.4). No one has yet succeeded in explaining the _ (puzzle) of how life began.5). He _ (puzzle) what to do next.6). _ _ _ (使我困惑的事情) is why he left the country without telling anyone.Keys: 1). puzzling 2). am puzzled 3). puzzled 4). puzzle 5) was puzzled 6). What puzzles me6. pull

23、v.拉，拖，拔；移动 n.拉，拖；拉(引)力典例1). You push and I ll pull. 你来推，我来拉。 2). I felt a pull at my sleeve and turned round. 我觉得有人扯我的袖子，便转过身来。重点用法pull ahead (of sb/sth) 领先（於某人/物）pull (sb) back（使某人）退却；撤回（某人）pull off (sth)（指机动车辆）驶离（道路）（至路侧停车处停下）pull out (sth.) 拉掉；使分离；掏出；驶离（车站）pull on 穿，戴上（袜子、手套等）pull together 同心协力；通

24、力合作练习 用pull短语的适当形式填空。1). I arrived as the last train was _ _.2). He _ _ a gun and aimed at the criminal.3). So long as we _ _, there s no mountain top we cant conquer.Keys: 1). pulling out 2). pulled out 3). pull together7. cheer vt. & vi. (使)高兴、振奋；(对)欢呼 cheerful adj.高兴的 cheerless adj.不高兴的 典例1). The

25、 crowd cheered loudly as the Queen appeared. 女王出现时群众高声欢呼。2). He was greatly cheered by the news. 他听到这个消息非常高兴。重点用法cheer sb. on为某人加油cheer (sb) up（使某人）更高兴或更快活练习 用cheer的短语或其适当形式填空。1). Your visit has greatly _ him up.2). The crowd _ the runners _ as they started the last lap.3). You look as though you ne

26、ed _ up.Keys: 1). cheered 2). cheered; on 3). cheering .重点词组1. to begin with = to start with 以开始；由作为开头；首先典例To begin/start with, I couldn t understand a single word. 起初，我一句也没弄明白。重点用法begin/start with 从开始 begin/start sth with 从开始 练习 根据句子的意思完成句子。1). He _ his speech _ a poem. 2). His speech _ _ a poem.3)

27、. _ _ _, pets are good friends of many lonely people, especially the old.Keys: 1). began/started; with 2). began/started with 3). To start/begin with 2. in time 及时；最终；迟早 典例 1). They caught the bus in time. 他们及时赶上了汽车。2). If you keep on, you will succeed in time. 如果坚持下去，你们总有一天会成功的。短语归纳 time短语：in time

28、for sth./ to do sth. 及时；不迟in no time 立刻；马上at no time永不 at one time 有个时期；曾经；一度 at a time 一次；每次 at times = sometimes 有时all the time 一直；始终；老是on time 按时；准时by the time到的时候为止for the time being 暂时；暂且take one s time不着急；慢慢来 kill time 消磨时间from time to time 不时地，间或many a time 常常；多次once upon a time 从前at the same

29、 time 同时；尽管如此ahead of time 提前，提早race against time 争分夺秒keep bad time（钟、表）走得不准time and again 一次又一次；重复地keep time (钟表)走得准have a good/nice/hard time (in) doing sth 做某事很 It s (high/about/very) time that sb. did/ should do sth. 是做某事的时候了 练习 用time短语填空。1). They sent the mail to me just _ _, before I 1eft.2).

30、William arrived at the theatre just _ _ for the play was to be on. 3). Hurry up! The concert will begin _ _ _. 4). _ _ _ will I give up. 5). The boy laughed and cried _ _ _ _.6). _ _ _ he was addicted to playing web games, but now he devotes himself to writing, which delights his parents.7). Dont tr

31、y to do everything at once; take it a bit _ _ _.8). Youll have your own office soon, but _ _ _ _ you ll have to share one with me.Keys: 1). in time 2). in time 3). in no time 4). At no time 5). at the same time 6). At one time 7). at a time 8). for the time being 3. in one s turn 轮到某人；接着 典例 I will s

32、ee you, each in your turn. 我将要一个接着一个地看你。短语归纳 turn短语：in turn轮流；一个接着一个by turns轮流；一阵一阵 take turns (to do sth.)轮流（做某物） Its ones turn to do sth. 轮到某人做某事了练习 用turn短语填空或翻译句子。1).She went hot and cold _ _.2).我们轮流着开车。_ 3). 今天轮到谁发言了？_ Keys: 1). by turns 2). We drove the car by turns / in turn. = We took turns t

33、o drive the car. 3). Whose turn is it to give a speech today?4. prevent.from = stop.from = keep.from 使不做事；阻止做某事典例 His back injury may prevent him from playing in tomorrow s game. 他背部的伤可能使他参加不了明天的比赛。【用法辨析】注意: prevent / stop sb. from doing sth.中的from可省, keep sb. from doing sth.中from不可省略，因为keep sb. doi

34、ng sth.是“使某人一直做某事”之意；但如在被动语态中，三者的from都不可省；当后接sb s doing sth. 作宾语时，只能用prevent或stop，不能用keep，因为没有keep sb s doing sth. 的句型。练习 根据句子的意思完成句子或翻译。1). Doctors took action to _ _ _ _ _ (防止这种疾病的蔓延).2).Of course I can t _ your going abroad. 3). 警察阻止他们携带武器。_ Keys: 1). prevent/stop/keep the disease from spreading

35、2). prevent / stop 3). The police prevented/stopped/kept them from carrying weapons.= They were prevented/stopped/kept from carrying weapons.5. block out 挡住（光线）典例That wall blocks out all the light. 那堵墙把光线都遮住了。短语归纳 out短语：break out 爆发，发生burst out 大声喊叫，突然起来go out 外出；过时；(灯)熄 help out 帮助解决难题(或摆脱困境)put ou

36、t 关(灯)；扑灭；生产come out 出现，显露；出版，结果是look out留神；注意watch out 注意；提防find out 找出，查明，发现think out仔细思考某事；想出（主意等）pick out挑出，辨认出，分辨出 speak out 大声地说，大胆地说 hang out 挂出，闲逛knocked out (拳击中)击倒，打昏sell out 售完(某种货物)，脱销 turn out 结果证明是run out (of) 用完，耗尽check out 结帐离去，办妥手续离去hand out 分发，散发give out 分发；用完，消耗尽；发出(光、声音等)练习 用out短

37、语填空。1). At the end of the race his legs _ _ and he collapsed on the ground.2). It s easy to _ him _ in a crowd because he is very tall. 3). His nwe book will _ _ next month.4). We thought it was going to rain; it _ _ to be a find day.5). We _ _ of/from our hotel at 5 a.m. to catch a 7 a.m. flight.Ke

38、ys: 1). gave out 2). pick; out 3). come out 4). turned out 5). checked out6. be off = set off 出发；动身；不用上班/学/开张典例 Then we were off. 随后我们就启程了。短语归纳 off短语：get off 下车fall off 从摔下来take off 脱下；起飞keep off 远离 turn off 关闭pay off 付清，还清set.off 给送行kick off 踢球 jump off 跳下 give off 散发 show off 炫耀shut off 关闭 练习 用tur

39、n短语填空或翻译。1). It is a Sunday and we _ _ (不用上班) today.2). Her husband _ _ on a business trip somewhere. 3). There we saw a sign reading, “_ _ the grass”.4). After ten years of hard work, she finally _ _ all her debts.Keys: 1). are off 2). was off 3). Keep off 4). paid off 7. break out (灾难、战争等) 突发；爆发典例

40、 Fire broke out during the night. 夜间突然发生了火灾。 短语归纳 break短语：break away from 脱离（党派）；摆脱（控制）break down毁掉；坏掉；(计划/谈判)失败break up打碎；拆散；(会议)结束；分裂(解体)break off (使)停止；中断；折断 break into sth. 强行进入某处break one s word/promise食言；说话不算数练习 用break短语填空。1). A terrible tsunami _ _ in the southeastern countries of Asia at Chr

41、istmas, 2004.2). When do you _ _ for Christmas?3). Negotiations between the two sides have _ _.4). His house was _ _ last week. Keys: 1). broke out 2). break up 3). broken down 4). broken into 8. watch out 密切注视；当心；提防 典例 Watch out! There s a car coming. 小心! 汽车来了。重点用法watch out for sb/sth 警惕或注意某人/事物wat

42、ch over 保护；照看 练习 用watch短语填空。1). There must have been an angel _ _ me that day.2). What problems should I _ _ _ when buying an old house?3). You ll become an alcoholic if you don t _ _.Keys: 1). watching over 2). watch out for 3). watch out .重点句子1. It exploded loudly with fire and rock, which were in

43、 time to produce the water vapour, carbon dioxide, oxygen, nitrogen and other gases, which were to make the earth s atmosphere. 它(地球)巨大的爆炸喷出了烈火与岩石。最终产生了水蒸气、二氧化碳、氧、氮和其他多种气体，从而形成了地球的大气层。解释“be + 不定式”结构通常用来表示“按计划或安排将要做的事情”，或表示上级对下级、父母对子女下命令，“应该做某事”或表示某事“将必然发生”。例如：1). Here is a message for you from your

44、head teacher: you are to go to her office after class. 你的班主任给你一个口信，要你下课后到她的办公室去。2). The worst is still to come. 更糟糕的事情还会发生。3). We ll hold a meeting tomorrow. = We are to hold a meeting tomorrow. = A meeting is to be held tomorrow. 我们明天将开会。4). The train is to arrive in Beijing at 10: 25 am. 这趟火车将于上午1

45、0: 25到达北京。练习 完成句子或翻译。1). Here is a message for you from your head teacher: you _ _ _ to her office after class. (你的班主任给你一个口信，要你下课后到她的办公室去。)2). The worst is still _ _ (come).3). We ll hold a meeting tomorrow. = We _ _ _ a meeting tomorrow. = A meeting is _ _ _ tomorrow.4). 这趟火车将于上午10：25到达北京。_ Keys: 1

46、). are to go 2). to come 3). are to hold; to be held 4). The train is to arrive in Beijing at 10: 25 am.2. That made it possible for life to begin to develop. 那使生命的生长发育成为一种可能。解释 此句中的made后跟带形式宾语it的复合结构，其中it是形式宾语，真正宾语是不定式复合结构，“for live to begin to develop”，宾语补足语是possible。再如：She made it her business to

47、 find out who was responsible. 她非要弄清楚是谁的责任不可。提示：常用于此结构的动词还有think，feel，find，consider等。例如：1). We make it a rule to get up at 6 o clock every morning.2). I find it hard to get along with him.3). He found it impossible to leave Germany for the USA. 他发现不可能离开德国去美国了。4). I think/find/feel/consider it my dut

48、y to help you.我觉得我有责任帮助你。练习 完成句子或翻译。1). We _ _ _ _ (规定) to get up at 6 o clock every morning.2). I _ _ _ (发现很难) to get along with him3). 他发现不可能离开德国去美国了。_4). 我觉得我有责任帮助你。_Keys: 1). make it a rule 2). find it hard 3). He found it impossible to leave Germany for the USA. 4). I think/find/feel/consider i

49、t my duty to help you.3. But when I tried to step forward I found I was carried twice as far as on the earth and fell over.而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是地球上的两倍，因而我摔倒了。解释 twice as.as. “是的两倍”，英语常见倍数的表示句型：1). 倍数+ as + adj./adv. + as “是的几倍” My room is twice as large as his.2). 倍数+ adj./adv.比较级+ than “比

50、(多/大)几倍”My room is twice larger than his. 3). 倍数+ the +表示长度/高度/宽度等的名词+ of “是的长度/高度/宽度几倍” My room is twice the size of his. 注意：此结构中常用的名词有：size, height, weight, length, width depth等。例如：1). This ruler is three times as long as that one. = This ruler is three times longer than that one. = This ruler is

51、three times the length of that one. 这把尺子是那把的三倍那么长。2). There are four times as many students as we expected. 到的学生是我们预计的五倍。解释 twice as . as. 是的两倍，英语常见倍数的表示句型：1). 倍数 + as + adj./adv. + as “是的几倍” My room is twice as large as his.2). 倍数 + adj./adv.比较级 + than “比(多/大)几倍”My room is twice larger than his. 3)

52、. 倍数+ the +表示长度/高度/宽度等的名词+ of “是的长度/高度/宽度几倍” My room is twice the size of his. 注意：此结构中常用的名词有：size, height, weight, length, width depth 等。练习 完成句子或翻译。1). 这把尺子是那把的三倍那么长。_2). 到的学生是我们预计的五倍。There are _ _ _ _ _ _ we expected.Keys: 1). This ruler is three times as long as that one. = This ruler is three tim

53、es longer than that one. = This ruler is three times the length of that one. 2). four times as many students as .课文佳句背诵与仿写）1【原句】What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. 模仿要点 句子结构： what主语从句is till +时间名词定语从句【模仿1】他要给我什么礼物一

54、直不知，直到昨天下文他来看我是我才知道。_答案：What gift he would give me was uncertain until yesterday afternoon when he came to see us. 【模仿2】没人知道我们将要得到什么样的工作，直到3年后我们从大学毕业以后才知道。_答案：What jobs we will get is unknown until 3 years later when we will graduate from university. 2【原句】What many scientists believe is that the con

55、tinued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. 模仿要点 句子结构: 主语从句 is that表语从句【模仿1】他想告诉我们的是一天下文当他在回家的路上看见一只小鸟受伤了。_答案：What he wanted to tell us is that one afternoon when he was on his way home he saw a bird which was dying.【模仿2】他缺席的原因是他在上学时被一辆小车撞伤了。_