Unit 4《Astronomy the science of the stars》Grammar-课件18(30张PPT)(人教版必修3)

必修3Unit 4 Astronomy: the science of the stars要点梳理高效梳理·知识备考●重点单词1．astronomy n．天文学→astronomer n．天文学家2．system n．系统；体系；制度3．theory n．学说；理论→theoretical adj.理论上的4．globe n．球体；地球仪；地球→global adj.全球性的；全世界的5．violent adj.猛烈的；激烈的；强暴的→violence n．暴力→violently adv.猛烈地6．atmosphere n．大气层；气氛7．unlike prep.不同；不像→dislike vt.不喜欢8．presence n．出席；到场；存在→present adj. & n. & v．在场的；目前，现在；出席；颁发，授予9．harmful adj.有害的；伤害的→harm n．危害，害处→harmless adj.无害的10．exist vi.存在，生存→existence n．存在，生存11．puzzle n．谜；难题vt. & vi.(使)迷惑；(使)为难→puzzled adj.迷惑的→puzzling adj.令人迷惑的12．gravity n．万有引力；重力13．satellite n．卫星；人造卫星14．climate n．气候15．spaceship n．宇宙飞船16．pull n. & vt.拉(力)；拖；牵引力17．float vi. & vt.(使)浮动；(使)漂浮 n．漂浮物18．mass n．质量；团；块；大量；(复)群众●重点短语1．in time 及时；终于2．lay eggs 下蛋3．give birth to产生；分娩4．in one’s turn 轮到某人；接着5．prevent...from 阻止；制止6．block out挡住(光线)7．cheer up感到高兴；感到振奋8．now that 既然9．break out突发；爆发10．watch out密切注视；当心；提防11．cool down 冷却12．as well as 也；还有……13．depend on依靠；依赖，取决于14．get close to 靠近●重点句型1．This produced a chain reaction, which made it possible for life to develop. 这就形成一个连锁反应，使生命发展成为可能。

Unit 4 Astronomy：the science of the stars 【美文阅读】关于大地起源的神话有许多许多，你了解多少呢？The sky and the earth were at first one blurred entity(混沌整体) like an egg. Then Pangu was born into it. The separation of the sky and the earth took eighteen thousand years. The yang which was light and pure rose to become the sky，and the yin which was heavy and murky(黑暗的)sank to form the earth. Between them was Pangu, who went through nine changes every day, his wisdom greater than that of the sky and his ability greater than that of the earth. Every day the sky rose ten feet higher, the earth became ten feet thicker, and Pangu grew ten feet taller. Another eighteen thousand years passed, and there was an extremely high sky, an extremely thick earth, and an extremelytall Pangu. After Pangu died, his head turned into the Five Sacred Mountains(Mount Tai, Mount Heng, Mount Hua, Mount Heng, Mount Song), his eyes turned into the moon and the sun, his blood changed into water in river and sea, his hair into grass. In all, the universe and Pangu combine in one.【诱思导学】1．Do you agree on the forming of the universe？Give your reasons.________________________________________________________________________________________________________________________________________________2．What kind of people is Pangu in your eyes?________________________________________________________________________________________________________________________________________________【答案】 1.No，I don't agree.Because the scientists have already found out how the universe formed.2．I think Pangu is very great and determined.He is a hero.Period ⅠPreviewing(教师用书独具)●教学目标本课时主要是通过学生对学案所给出的内容的学习，了解本课文中所出现的词汇，初步了解课文以及相关的背景知识，就下一堂课对课文的全面理解起到一个铺垫作用。

【高二】Unit 4 Astronomy：The science of the starsUnit 4 Astronomy：The science of the stars1. spreadvt.&vi. 展开,铺开;散布;扩大;延伸The bird spread its wings. 那只鸟展开了翅膀。

Flies spread disease. 苍蝇传播疾病。

常用结构:spread sth. with sth. 用……抹/涂/铺……spread ...on ...把……抹/涂/铺在……be spread for摆好（桌子）准备spread oneself\[口\]舒展四肢(躺下)spread out张开，伸开，铺开，展开，伸长高手过招单项填空Paper making began in China and to Europe.(2021•12•河南郑州检测)A. SpreadB. grewC. CarriedD. developed解析:选A。

句意为：造纸术起于中国，又传播到了欧洲。

spread传播。

2. methodn. 方法He has introduced a new method of teaching.他引进了一种新的方法。

What is the most effective method of birth control?控制出生率的最有效的方法是什么？联想拓展by this means=in this way=with this method用这种方法易混辨析method/meansmethod侧重“理论方法”，指做某事的具体步骤或程序。

a new teaching method一种新的方法means（单复数同形）侧重“通过手段”或“利用工具”去达到某种目的。

高手过招选词填空(method/means)（原创）①The quickest of travel is b y plane.②She has a very scientific of dealing with political problems.答案：①means②method3. harmfuladj. 有害的常用结构:do sb. harm/do harm to sb. 对某人有害mean no harm 无意伤害别人;没有恶意harm one’s image/reputation 损害某人的形象/名声do more harm than good 弊大于利There is no harm in (sb.?s) doing sth.=It does no harm (for sb.) to do sth. (某人) 做某事无害处 be harmful to 对……有害harm n.&v. 损害，伤害Smoking is harmful to your health. 吸烟有害健康。

Unit 4 Astronomy：the science of the stars 课文知识点解析Warming UpDiscuss in pairs which science subjects are part of medicine,biochemistry,geophysics or astronomy.分组讨论哪些科学科目是医学，生物化学，地理学或天文学的一部分。

in pairs=two at a time=in twos一次两个，两个一组e.g.Shoes and slippers are sold in pairs.鞋子都是论双卖的。

注意：in+数词/名词（数词/名词以复数形式）e.g.in threes and fours 三三两两的in groups 成群的思维拓展in在这里表示：以……数量/形式、形状等。

e.g.Tourists queue in thousands to see the tomb. 游客数以千计排着队看陵墓。

Reading1.The problem was that the earth became violent because it was not clearwhether the solid shape was to last or not.这一问题变得越来越不确定，因为这一球体形状是否能够维持尚未明朗。

(1)violent adj. 猛烈的；激烈的；强暴的a violent language 激烈的语言a violent storm 猛烈的风暴a violent 猛攻思维拓展violence n.［U］1.暴力，强暴2.猛烈，剧烈，强烈(2)whether...or not... “是……还是……”在这里是主语从句,它还可以引导宾语从句、表语从句、同位语从句和状语从句。

e.g.I don’t know whether he will agree with me.（宾语）我不知道他是否同意我的观点。

Unit 4 Astronomy: the Science of the Stars (B 3) Section 1 Warming Up, Reading & Comprehending重点知识精讲一、重点单词1. science n.⑴[U] 科学；自然科学the law of science 科学规律new developments in science technology 科学技术的新发展⑵[C;U] 自然科学学科to study one of the science 攻读一门自然科学⑶[sing] （尤指人文、社会）学科；学Is there an adequate basis for a science of international policies. 国际政治作为一门学科是否有足够的基础。

【知识拓展】scientific adj. 科学（上）的；关于科学的；有系统的；有条理的scientist n. 科学家scientifically adv. 科学上；合乎科学地science fiction 科幻小说（或影片等）science park 科技园区2. system n.⑴（思想或理论）体系；方法；制度；体制He wrote an article on the British educational system. 他写了一篇关于英国教育制度的文章。

What do you think of the new system for assessing personal tax bill? 你认为这种新的个人税收评估制度怎么样？⑵系统The transport system needs to be improved 运输系统需要改进。

【知识拓展】systematic adj. 系统的；成体系的；有条理的systematically adv. 有步骤地；成体系地；系统地systematize vt. 使系统化；使成体系the system 沿袭已久的方法、做法或规则get sth. out of one’s system 宣泄；排解；消解（强烈的感情或欲望）3. violent adj.⑴使用暴力的；暴力引起的（尤指非法的）Students were involved in violent clashes with the police. 学生和警察发生了暴力冲突。

Unit 4Astronomy: the science of the starsⅠ.单项填空1．—I was trying to carry out the plan, but I failed.—Well, you________，for we were uncertain it would do________.A．needn't do that；in factB．needn't have done；in effectC．needn't have；in practiceD．needn't；in time答案C[needn't have done 没有必要做某事而做了，为避免重复，答语中可省略动词，只保留助动词have。

in fact＝in effect，实际上；in practice在实践中；in time 及时；迟早。

句意：——我试图实施这计划，但我失败了。

——哦，你本没有必要那么做，因为我们不确定在实践中它是否有效。

]2．Tom has agreed to let me use his computer to surf the Internet, and________I' m treating him to a good dinner at the newly-built restaurant just around the corner.A．in charge B．in placeC．in return D．in turn答案C[考查介词短语的辨析。

in charge负责；掌管；in place在适当的位置；in return 做为回报；in turn反过来。

句意：汤姆同意我让我用他的电脑上网，做为回报，我要在拐角处新开的饭馆请他好好吃一顿。

]3．We should do what we have to do________we can do what we want to do in the future.A．so that B．in caseC．for fear that D．now that答案A[考查状语从句的连接词。