2017_2018学年高中英语Unit4AstronomythescienceofthestarsSectionⅡ课件新人教版.pptx

Section Learning about Language, Using Language,Summing Up & Learning Tip,一,二,一、词汇新知 1.通过查阅词典,写出下列单词的派生词 (1)biology n.生物 n.生物学家 adj.生物的;生物学的 (2)gentle adj.温和的;文雅的 adv.温和地 (3)physicist n.物理学家 n.物理;物理学 adj.物理的 (4)weight n.重量 v.称的重量;重达 adj.失重的;无重力的 adv.失重地 (5)exhaust vt.用尽;耗尽;使筋疲力尽 adj.筋疲力尽的 adj.令人筋疲力尽的,biologist,biological,gently,physics,physical,weigh,weightless,weightlessly,exhausted,exhausting,一,二,2.用所给词组的适当形式填空 cheer up,now that,break out,watch out (1) we have come to China,lets visit the Great Wall. (2)You should always for those sleeping dogs that may attach you anytime. (3)The young man began to when I promised to help him. (4)Do you know when the Second World War ?,Now that,watch out,cheer up,broke out,一,二,二、阅读导学 1.阅读课文“A VISIT TO THE MOON”,根据课文内容判断正“T”误“F” ( )(1)The force of gravity changed three times and the last change was the most powerful. ( )(2)We were too far from the earth to feel its pull. ( )(3)On the moon,our weight would be less than on the earth because we were too far from it. ( )(4)Leaving the moons gravity was as painful as leaving the earths. ( )(5)Space travel was very exhausting,so the writer didnt like it at all.,F,T,F,F,F,一,二,2.阅读课文“A VISIT TO THE MOON”,根据课文内容选择正确答案 (1)The passage is mainly about . A.an introduction of the moon B.the gravity that I felt on my way to the moon C.my visit to the moon D.my friend Li Yanping,an astronomer (2)From the text,we know that the force of the gravity would change times. A.2 B.3 C.4 D.5,C,B,一,二,(3)When or where did the author feel strongest of the gravity of the earth? A.On the moon. B.On the half way to the moon. C.At the very beginning. D.On their leaving from the moon. (4)What causes the author to feel that he becomes weightless on the moon? A.Spaceship. B.Gravity. C.His friend. D.Good feelings.,C,B,1,2,3,4,5,As a result of this event,a great dust cloud formed in the sky blocking out the sunlight.(Page 29) 正因为这一事件,天空中形成了一团巨大的尘云,挡住了阳光。 block out挡住,遮住(光线和声音);忘掉,抹去(不愉快的事) The noise from the car blocked out the sound of our voices. 汽车的噪音把我们的声音盖下去了。 An ugly building blocked out the view from the window. 一座难看的大楼把窗外的景物遮住了。 I try to block out the unpleasant experience. 我尽力去忘记那段不愉快的经历。,1,2,3,4,5,合作探究 (1)读一读细观察 阅读下列句子,注意block的用法。 Various barricades block off all the main streets of the city. The traffic is very heavy and has begun to block up the streets. My nose is blocked up with the cold. We found that a big elephant blocked our way. (2)写一写勤总结,封锁,封闭,阻塞;封住(孔、洞等),挡住某人的路,1,2,3,4,5,1,2,3,4,5,I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.(Page 31) 我立刻感到很高兴,由于失重我在太空舱里飘来飘去,我望着(身后的)地球越来越小,而(前方的)月球越来越大。 cheer up 感到高兴;感到振奋 Upon arriving at the classroom,the author was cheered up by a warm welcome. 一到教室,作者就被热烈的欢迎振奋了精神。 Cheer up!Things will work out for the best. 振作起来!事情会有好结果的。,1,2,3,4,5,合作探究 (1)读一读细观察 阅读下列句子,注意黑体词的用法。 The crowd cheered loudly as the Queen appeared. His speech was cheered by the audience. She masked her sufferings with a cheerful smile. 【高考典句】(2016天津高考)Cathy didnt expect any award but was still there to cheer on her friends and praise their accomplishments. 凯茜没有期望任何奖赏,但仍在那儿为她的朋友们鼓劲加油,并且赞美他们的技能。 Cheers!With our coffee cups for our future!,1,2,3,4,5,(2)写一写勤总结,欢呼;喝彩,欢快的;愉快的,为某人加油,干杯(用于祝酒),1,2,3,4,5,1,2,3,4,5,“Oh,dear,”I cried,“walking does need a bit of practice now that gravity has changed.”(Page 31) “天哪,”我大声说,“重力改变了,看来走路也的确需要练一练了。” now that 既然 Now that you are on the business,whats your advice for someone to become a fashion designer? 既然你是从事这个行业的,你对于想成为一个时尚设计师的人有什么建议? Now that you are a college student,you should learn to be independent of your parents help. 既然你已是个大学生了,就应当学着独立,不靠父母的帮助。,1,2,3,4,5,合作探究 想一想善辨析 辨析because,since/as/now that和for的不同用法。 Why do you want to go there with me?为什么你想和我去那儿? Because I want to take care of you.因为我想去照顾你。 because表示直接的原因,常用来回答why引起的问句;此外,在强调句型中,如果需要强调原因,也只能用because。 Since/As/Now that everything is ready,lets begin. 既然一切准备就绪,我们就开始吧! since/as/now that语气较弱,常用来说明已知的原因。 Spring may come here,for birds are singing in the forest. 春天可能来了,因为鸟儿在林中歌唱。 for用来表示原因时是并列连词,for后的句子对前面的话进行解释,常用逗号同前面的句子分开,for不放在句首。,1,2,3,4,5,1,2,3,4,5,We watched,amazed as fire broke out on the outside of the spaceship as the earths gravity increased.(Page 31) 我们惊奇地看着,随着地球引力的增加,宇宙飞船的外层燃烧起火。 break out 突发;爆发 I was still sleeping when the fire broke out and then it spread quickly. 我还在睡觉时着火了,然后火迅速蔓延。 War broke out one evening.一天晚上,战争爆发了。,1,2,3,4,5,合作探究 (1)读一读细观察 阅读下列句子,注意break词组的用法。 The computer system broke down suddenly while he was searching for information on the Internet. 当他在因特网上搜索信息时,电脑系统突然崩溃了。 The police came to break up the crowd.警察来把人群驱散开。 Please dont break in on our conversation.请别打断我们的谈话。 We may break off relations with that country. 我们有可能和那个国家断绝关系。 You must break away from such bad habits. 你必须戒掉这样的坏习惯。 We had to break into the house as we had lost the key. 因为我们弄丢了钥匙,所以不得不破门而入。,1,2,3,4,5,(2)记一记长知识,1,2,3,4,5,1,2,3,4,5,Watch out for.(Page 31) 当心 watch out 密切注视;当心;提防 Watch out(=Take care)!There is a danger ahead. 当心!前面有危险。 Watch out for cars when you walk along the street. 当你在街上行走时,当心汽车。 归纳 watch out后常接介词for,表示“当心”。,1,2,3,4,5,合作探究 (1)读一读细观察 阅读下列句子,注意watch词组的用法。 They watch closely over you. Please watch over the little birds for me. You will watch your tongue/mouth in my presence! There they abandoned their car and continued on foot,sleeping in the forest and taking turns to keep watch. I was serving on the lead battleship and was on watch on the bridge as night fell. Watch your step.Theres a hole in the sidewalk.,1,2,3,4,5,(2)写一写勤总结,注视;照看;保护,说话当心,放哨;站岗,值班,当心脚下,1,2,3,4,5,一、单句改错 1.Now