B3Unit 4 Astronomy语言点-学案及答案

高一英语必修3Unit 4 Astronomy: the science of the stars—ReadingLanguage Points学案主编：苑颖审核：编号：3402班级：______ 姓名：________ 使用日期：_______【学习目标】：1. To learn some useful words and expressions in the text.2. To learn some important and difficult sentence patterns in the text.【Teaching procedures】一、【课前预习】I. Write and Read .1. ___________ 太阳系2. _____________________ 普遍为人们所接受的理论3.______________及时；终于4._____________________ 地球的大气层5. _________________________________________对生命的发展起关键作用6. _______________________ 一系列的反应7. _____________ 下蛋8. ___________________ 生产；分娩9. _____________ 轮到某人，接着10._______________________ 防止/阻止…做…II.【复杂句子分析】Analyze the following difficult sentences in the text.1．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. 句式分析：这是一个__________（A.简单句 B 复合句）。

________引导主语从句，在从句中作________。

what引导的名词性从句除了作主语外，还可以作宾语、表语等。

自主翻译：________________________________________________________________________________ 。

2．The earth became so violent that it was not clear whether the shape would last or not.句式分析：这是一个__________（A.简单句 B 复合句）。

此处为连词___________引导的结果状语从句，其中从句中的_______为形式主语，连词_____________引导的从句为真正的主语。

自主翻译：___________________________________________________________________________ . 3．So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.句式分析：这是一个__________（A.简单句 B 复合句）。

第一个whether引导___________；第二个whether 引导______________。

自主翻译：_______________________________________________________________________________。

二．【课堂探究】Language points –Exploring & Learning1．violent adj. 猛烈的；激烈的；强暴的→_________ n. 暴力；暴行；激情→________adv. 猛烈地[语境感悟](1)(教材P)The earth became so violent that it was not clear whether the shape would last or not.25Larry was in __________ pain. As a result，he behaved _________ and treated everything with __________. 2．harmful adj. 有害的[语境感悟](教材P)What many scientists believe is that the continued presence of water allowed the earth to26dissolve harmful gases and acids into the oceans and seas.[即时跟踪]同义句转换/完成句子Watching TV too much does harm to your eyes.→Watching TV too much _______________ your eyes.→Watching TV too much _______________ your eyes.3．exist vi. 存在；生存[语境感悟](1)(教材P)They laid eggs too and existed on the earth for more than 140 million years.26(2)There exists a tall tree in front of my home. 在我家门前有一棵很高的树。

(3)Do you know when this kind of robot came into existence?你知道这种机器人是什么时候问世的吗？①He doesn't believe in the __________ (exist) of ghosts(鬼)．②Dinosaurs __________ (exist) on the earth a long time ago.4．puzzle n．谜；难题；vt. & vi. (使)迷惑；(使)为难[语境感悟](1)(教材P)How life began on earth is one of the biggest puzzles that scientists found hard to solve.27地球上生命的起源是科学家们难以解决的最大难题之一。

①The __________ boy __________ his mother，so there was a _________ expression on her face. Much to the___________ of his mother，he left home without saying a word.1．in time及时；终于；迟早；总有一天[语境感悟](1)(教材P)They were in time to produce carbon dioxide，nitrogen，water vapour and other gases，25which were to make the earth's atmosphere.①I feel him a little stubborn __________(有时).②Fortunately，a soldier came to rescue __________ (及时)to save the drowning boy.③Hurry up！The concert will begin __________（马上）.2．give birth to产生；分娩[语境感悟](1)(教材P)These animals were different from all life forms in the past，because they gave birth26to young baby animals and produced milk to feed them.【即时练习】她生了双胞胎。

She ____________________ the twins last night.3．in one's turn轮到某人；接着[语境感悟](1)(教材P)Thus they have，in their turn，become the most important animals on the planet.26[即时跟踪]单句语法填空/完成句子①They should take turns _______ looking after their old mother.②We do some cleaning __________ turns.③She will，in __________ turn，be on duty tomorrow.④The children took their turns __________ (paint) the wall.4．prevent. . . from. . . 阻止……做某事[语境感悟](1)(教材P)They are putting too much carbon dioxide into the atmosphere，which prevents heat from26escaping from the earth into space.[即时跟踪]单句语法填空/完成句子① Soldiers have been sent to prevent the fire ______________ (spread) to the next building.②I don't want to be here any longer；they have kept us ______(wait) for them fora long time.③The plan can be prevented ________ being carried out.三．【课堂巩固】单句语法填空1．_______________ (multiply) very fast，rabbits soon became the largest family of all the animals in this woods.2．I was ______________(puzzle) about how to handle the situation.3．The thief attached me ______________ (violent) and I was knocked down before I could ask for help.4．After Yang Liwei succeeded in circling the earth，________our astronauts desire to do is walking in space.5．Do they exist ________ vegetable food?6．Your smoking can be ___________ (harm) to the health of your children.7．The animal gives birth ___________ young baby animals in the ocean.8．I was prevented__________ attending the meeting by a cold.Unit 4 Astronomy: the science of the stars—ReadingLanguage Points学案—参考答案主编：苑颖审核：陈建胜编号：3402班级：______ 姓名：________ 使用日期：_______【学习目标】：1. To learn some useful words and expressions in the text.2. To learn some important and difficult sentence patterns in the text.【Teaching procedures】I.【课前预习】Write and Read1. solar system 太阳系2. a widely accepted theory 普遍为人们所接受的理论3.in time及时；终于4. the earth's atmosphere 地球的大气层5. be fundamental to the development of life 对生命的发展起关键作用6. a chain reaction 一系列的反应7. lay eggs 下蛋8. give birth to 生产；分娩9. in one’s turn轮到某人，接着10. prevent…from doing sth.防止/阻止…做…II.【复杂句子分析】Analyze the following difficult sentences in the text.1．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.句式分析：这是一个B复合句（A.简单句 B 复合句）。