人教版高一英语必修三专题之 学海探究 学案：Unit1 Section IV.doc

课堂探究1.we were pushed back into our seats because we were trying to escape the pull of the earths gravity.由于我们正试着脱离地球的引力，因此被向后推在座位上。考点：pull n拉（力）；拖；牵引力高考典句finally，there was a sudden pull at the pole and a fish was caught.最后，鱼竿猛地一拉，钓上了一条鱼。to escape the pull of the earth，a rocket must reach a speed of 28,440 km/h.要想脱离地球的吸引力，火箭的速度必须达到每小时28,440千米。考点延伸 （1）阅读下列句子，指出pull的词性及含义。pull the door open.dont push it.把门拉开，不要推。词性：_含义：_ he pulled the dead dog out of the yard.他把那条死狗拖出了院子。词性：_含义：_ the dentist pulled one of my teeth.牙医拔掉了我的一颗牙。词性：_含义：_ the advertisement pulled young people to the new product.这则广告引起了年轻人对这款新产品的关注。词性：_含义：_ （2）阅读下列句子，指出pull的词组及含义。she pulled on her boots and then left the house.她穿上靴子，然后离家走了。词组：_含义：_ the boy pulled his shirt off and threw it onto his bed.这个男孩把衬衣脱掉往他的床上一扔。词组：_含义：_ several houses were pulled down to make way for the new road.为了给新修的道路让路，几座房屋被拆毁了。词组：_含义：_ he pulled in for gas.他把车开进加油站加油。词组：_含义：_ the anchor was raised and the ship pulled out.船起了锚，离开了海岸。词组：_含义：_ the expert medical treatment pulled him through.高超的医疗技术使他恢复了健康。词组：_含义：_ the policeman pulled up the motorist and asked to see his licence.警察让那个开车的人停下来，要求看他的执照。词组：_含义：_ （3）辨析pull，drag，draw和push的不同用法pull指各种情况的“拉”，但有时强调一时或突然地拉。drag指慢慢地平拉，往往指费力拉笨重的东西。draw指比较轻松地拉物体，用力较小。push是指“推”，用力方向与上述三者相反。即学即用用pull，drag，draw或push填空（1）he _ the heavy bag out of the shop.（2）she _ a chair to the desk and sat down.（3）he tried to kiss her but she _ him away.（4）he _ his muscles in the leg while doing exercise.用适当的介词或副词填空（5）pull _ your gloves when you go out.（6）the old building has been pulled _ for safety reasons.（7）the doctor said i was going to pull _ soon.（8）the strong wind pulled _ the big tree.（9）she pulled _ to let the ambulance pass.语法填空（10）after the whole days hard work，he _（drag）his wornout legs back to his home.（11）the famous film star pulled _ her hat so that nobody would recognize her.（12）the old lady was seriously ill for a time，but she managed to pull _ with careful nursing in hospital.2i cheered up immediately.我立刻感到很高兴考点：cheer up 感到高兴；感到振奋高考典句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/高兴点儿！事情会有好结果的。考点延伸 （1）阅读下列句子，指出黑体词的词性及含义。all the crowd cheered and threw their hats up in the air.整个人群都欢呼起来，把帽子抛向空中。词性：_含义：_ his speech was cheered by the audience.他的演说博得听众的喝彩。词性：_含义：_ cheers！with our coffee cups for our future!以咖啡代酒，为我们的未来干杯！词性：_含义：_ she masked her sufferings with a cheerful smile.她用欢快的笑容掩盖了内心的痛苦。词性：_含义：_ （2）阅读下列句子，指出cheer的词组及含义。the spectators cheered the runners on.那些观众为运动员们加油。词组：_含义：_即学即用语法填空（1）im thinking of the test tomorrow.im afraid i cant pass this time.cheer_！im sure youll make it.（2）the winning team were _（cheer）by their supporters.（3）lets hold up glasses，and cheer _ our friendship!3but when i tried to step forward，i found i was carried twice as far as on the earth and fell over.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。考点：倍数的表达法the newlybuilt railway is twice as long as the old one.那条新修建的铁路是旧铁路的两倍长。as we all know，cats sleep twice as much as people.众所周知，猫睡觉的时间比人长一倍。考点延伸 阅读下列句子，指出倍数的表达方式。the production of grain has increased by four times this year.今年粮食产量增加了4倍。方式一：主语谓语_，表示：主语了多少倍。the earth is 49 times the size of the moon.地球的大小是月球的49倍。方式二：主语谓语 _ 被比较的内容，用于尺寸、体积、数量、长度等的比较。the production of this year is twice that of last year.今年的产量是去年的两倍。方式三：主语谓语_ of.my new house is two times bigger than my parents.我的新房子比父母的房子大两倍。方式四：主语（a）谓语倍数_ _b，表示“a比b大（小、高、长等）多少倍”。the population of the city now is three times what it was ten years ago.这个城市现在的人口是10年前的3倍。方式五：主语谓语_从句即学即用语法填空（1）this restaurant wasnt half _ good as that other restaurant we went to.（2）americans eat _（two）as much protein as they actually need every day.（3）peters jacket looked just the same as jacks，but it cost three times as much _ his.（4）with the development of economy，the price of the daily foods is twice _ of last year.4.walking does need a bit of practice now that gravity has changed.重力改变了，看来走路也的确需要练一练了。考点：now that 既然高考典句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 everybody is here，we can begin the meeting.既然大家到齐了，我们就开始开会吧。考点延伸 阅读下列句子，指出because，since/as/now that，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_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，我们开始吧！since/as/now that语气较弱，常用来说明_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_连词，for后的句子对前面的话进行_，常用逗号同前面的句子分开，for不放在句首。即学即用用because，as，since，now that或for填空（1）why did you do it?_ it is good for me.（2）it rained last night，_ the ground is wet.（3）_ you have known it，i wont repeat it.（4）_ you were out，i left a message.语法填空（5）now_ you are good friends，you should lend him a hand when he is in trouble.（6）_ you have been chosen to go abroad for further study，you should make full use of the chance.5we watched，amazed as fire broke out on the outside of the spaceship as the earths gravity increased.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。考点：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。when the civil war broke out，i was studying in paris.内战爆发时我正在巴黎学习。考点延伸 阅读下列句子，指出break的词组及含义。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。词组：_含义：_，此外该词组还有“_”的含义。 the police came to break up the crowd.警察来把人群驱散开。词组：_含义：_，此外该词组还有“_”等含义。what right do you have to break in here and search?你们有什么权利闯进来搜查？词组：_含义：_，此外该词组还有“_”等含义。we may break off relations with that country.我们有可能和那个国家断绝关系。词组：_含义：_，此外该词组还有“_”等含义。you must break away from such bad habits.你必须戒掉这样的坏习惯。词组：_含义：_，此外该词组还有“_”等含义。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。词组：_含义：_，此外该词组还有“_”等含义。即学即用用适当的介词或副词填空（1）unluckily，my car broke _ on the way to the airport.（2）youd better not break _ while others are chatting.（3）for some reason，she broke _ laughter during class.（4）at the meeting he broke _ his speech to answer the mobile phone.（5）the police came and broke _ the crowds gathering on the square.（6）it is reported that a violent earthquake broke _ in that country.语法填空（7）why are the couple so upset?oh，a quarrel on daily things _（break）out just now.（8）he had to pause from time to time to wipe the sweat from his forehead，because the airconditioning system broke _.（9）im surprised to hear that sue and paul have broken _.so am ithey seemed very happy together when i last saw them.6watch out for.当心考点：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。the american government warned its citizens to watch out for terrorists.美国政府提醒其公民当心恐怖分子。归纳：watch out后常接介词for，表示“当心”。考点延伸 （1）阅读下列句子，指出watch的词组及含义。they watch closely over you.他们密切注视着你。词组：_含义：_ please watch over the little birds for me.请帮我照看一下小鸟。词组：_含义：_ you will watch your tongue/mouth in my presence!在我面前，说话注意点！词组：_含义：_ there they abandoned their car and continued on foot，sleeping in the forest and taking turns to keep watch.在那里，他们扔下了他们的汽车，徒步前行。睡觉就在树林里，并轮流站岗。词组：_含义：_ i was serving on the lead battleship and was on watch on the bridge as night fell.我当时正在战舰上服役，夜幕降临时，我来到舰桥上值班。词组：_含义：_ watch your step.theres a hole in the sidewalk.当心脚下。人行道上有个坑。词组：_含义：_ （2）watch out的同义词组有：look out当心take care注意；当心look out for注意/当心即学即用用适当的介词或副词填空（1）watch _！the man close to you used to be a thief.（2）you have to watch out _ fast traffic along here.（3）we need a shepherd watching _ our sheep.语法填空（4）he minds so much about his position in the company that he watches out_any chance to be promoted.翻译句子（5）你要当心你身后的那个男子。_参考答案1及物动词拉及物动词拖拽及物动词拔出及物动词吸