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1、Unit4ReadingMovingtoMarsWords andExpressionsplanetcrowdedpollutedrapidincrease(all)overagainpassengeralla/thespeedofn.行星行星adj.拥挤的拥挤的adj.被污染的被污染的adj.快的，迅速的快的，迅速的n.增加增加再；重新再；重新n.乘客乘客以以的速度的速度Words andExpressionsuncomfortableoxygenintheformoftastyspeciallyfloatcomparecompareto/withadj.使人不舒服的；不适的使人不舒服的；不
2、适的n.氧气氧气以以的形式的形式adj.味道好的味道好的adv.专门地，特地专门地，特地vi.飘浮；漂浮飘浮；漂浮vt.&vi.比较比较与与相比相比Words andExpressionsinterplanetarynetworkchallengingrapidlyadj.行星间的行星间的n.网络网络adj.挑战性的挑战性的adv.快地，快速地快地，快速地Letsenjoysomevideos.MovingtoMars1.TolearnsomethingaboutlifeonMars2.TolearnthewordsandphrasesinthispassageWords:planetpoll
3、utedrapidincreasepassengerrapidlytastycomparePhrases:alloveragainata/thespeedofintheformofcompareto/withPatterns:ItishopedthatHereiswhatlifetherecouldbelike.OurspacecraftaretooslowtocarryRobotswoulddomostoftheirworksothatDoyouthinkitispossibleforhumanbeingstoliveonMars?DiscussionLetsenjoyavideo.Read
4、thepassage,matchthewordsontheleftwiththemeaningsontheright.crowdedrapidpopulationalloveragainpassengertastyspeciallycompareforonepurposeasecondtimefromthebegindecideinwhatwaythingsaresimilarordifferenthavinganicetastefullofpeoplehappeninginashortperiodoftimeapersonwhoridesinacar,bus,train,etc.butdoe
5、snotdriveitthetotalnumberofpeopleinanarea,acountry,etc.TaskoneMatchthekeywordswiththelinks.Writethecorrectlettersintheblanks.CDBEAReadthepassageandchosethebestanswer.TasktwoReadthepassageandchosethebestanswer.Readthepassageandanswer:Whatwilllifebelike?Transportatpresent2100Howdowegetthere?Howlongdoe
6、sittake?Howwillwegetthere?Howlongwillittake?TaskthreeFoodWhatwillweeatonMars?GravityWillitbeabigproblem?Whyisitabigproblem?Whyisitverydangerous?Topreventthis,whatshouldpeopledo?educationWhatkindofschoolwillstudentsstudyin?Whatdotheycalltheirteachers?Completethislist.Usetheinformationfromthearticleon
7、pages52and53.TaskfourReadthepassagecarefullyandcompletethelist.Earth todayMars in 2100It is polluted and crowded.It would be clean and have lots of space.Spacecraft are slow.There is enough water and oxygen.Spacecraft would travel at the speed of light.There might not be enough water and oxygen.Eart
8、h todayMars in 2100There are many kinds of tasty food.Gravity is not a problem for us.Many people live in small flats.People have little time to relax.Students study at real schools.Food would most probably be in the form of pills and would not be so tasty.People would have to wear special boots.Peo
9、ple might live in houses with huge comfortable rooms.People could have more time to relax.Students would study at online schools.Fill in the blanks.TheEarthisbecomingmoreandmorecrowdedandpolluted_the_inpopulation.Itishopedthatpeoplecouldstart_onMars.Hereiswhatlifetherecouldbe._2100,thejourneytoMarsm
10、ightonlytakeabout20minutesinspacecraftthattravel_light!Andfoodwouldmostprobablybe_pillsandwouldnotbeso_.rapidincreasebecauseofalloveragainBytheyearatthespeedofintheformofTaskfivetastyPeoplewouldhaveto_bootsthatarespeciallydesignedtopreventthemselves_(floatoff)intospace.Atthesametime,peopleonMarswoul
11、dhavemorespace.Theymightliveinhouseswithhugecomfortablerooms.Also,robotswoulddomostoftheirwork_theycouldhavemoretimetorelax.LifeonMarswouldbeinteresting_challenging.fromfloatingoffsothataswellaswear1.Atpresent,ourspacecraftaretooslowtocarrylargenumbersofpassengerstoMars.目前，我们的宇宙飞船太慢了，无法运目前，我们的宇宙飞船太慢
12、了，无法运送大批的乘客去火星。送大批的乘客去火星。Largenumbersof表示表示“大量的大量的”=alargenumberofLargenumbersofpeoplegotravellingduringtheNationalDayholiday.2.Withthedevelopmentoftechnology,bytheyear2100,thejourneymightonlytakeabout20minutesinspacecraftthattravelatthespeedoflight!随着技术的发展，到随着技术的发展，到2100年，乘坐以光速飞行的年，乘坐以光速飞行的宇宙飞船，行程或
13、许只要大约宇宙飞船，行程或许只要大约20分钟！分钟！Iwassecondintheracewithatimeof14.2seconds.介词介词with短语，在句中常用作状语，表短语，在句中常用作状语，表示原因、条件、时间、伴随、方式等。示原因、条件、时间、伴随、方式等。我以我以14.2秒的成绩在比赛中位列第二。秒的成绩在比赛中位列第二。BythetimeIgottothestationthetrainhadalreadygone.by表示表示“到到.为止，截止为止，截止.”等我到达火车站时，火车已经开走了。等我到达火车站时，火车已经开走了。 ata/thespeedof表示表示“以以的速度的
14、速度”Thecarismovingataspeedof100kilometresperhour.小汽车正以每小时小汽车正以每小时100公里的速度行驶。公里的速度行驶。3.ThegravityonMarsisonlyaboutthree-eighthsofthatontheEarth.火星上的重力大约只有地球上的八分之三。火星上的重力大约只有地球上的八分之三。TheaironMarsismuchthinnerthanthatontheEarth.在做比较时，我们常用在做比较时，我们常用that/those指代句指代句中类似或相同的那一部分。此句中中类似或相同的那一部分。此句中that指指代前面的
15、代前面的gravity.火星上的空气要比地球上的稀薄的多。火星上的空气要比地球上的稀薄的多。Three-eighths八分之三八分之三分数在英语中通常是借助于基数词和序分数在英语中通常是借助于基数词和序数词来共同表达的。其中基数词表示分数词来共同表达的。其中基数词表示分子，序数词表示分母。如：子，序数词表示分母。如：one-tenth十分之一十分之一athird三分之一三分之一注意：分子除用注意：分子除用one外，也可用外，也可用a；twothirds三分之二三分之二fourfifths五分之四五分之四但是，但是，1/2不能说不能说a(one)second,而而要说要说a(one)half。1
16、/4和和3/4可以说可以说a(one)fourth和和threefourths,但常用但常用aquarter和和threequarters表示。表示。如果分子大于如果分子大于1，分母要用复数形式。分母要用复数形式。如：如：选择题。选择题。About_ofthestudentsarefromforeigncountries.(2011山东东营山东东营)A.threefourB.threefourthC.thirdfourthD.threefourths翻译句子。翻译句子。我们班五分之三是女生。我们班五分之三是女生。_thestudentsinmyclass_girls.Three-fifthso
17、fare4.ComparedwithlifeontheEarth,lifeonMarswouldbebetterinsomeways.与地球上的生活相比，火星上的生活在有些方与地球上的生活相比，火星上的生活在有些方面要好些。面要好些。Childrenseemtolearnmoreinterestingthingscomparedto/paredwith表示表示“与与相比相比”此句中的此句中的“comparedwiththelifeontheEarth”为为v-ed短语作状语。短语作状语。与我们上学时相比，孩子现在学到的有趣与我们上学时相比，孩子现在学到的有趣东西似乎更多一些。东西似乎更多一些。
18、 拓展：拓展：compare.to意为意为“把把比作比作”。Shakespearecomparedtheworldtoastage.莎士比亚把人世比作舞台。莎士比亚把人世比作舞台。用用comparewith和和compareto的正确形式填空。的正确形式填空。1.Hecannot_Shakespeareasawriteroftragedies.2.Youcannot_thiswar_theVietnamwar(越南战争越南战争).comparewithcompareto4.LifeonMarswouldbeinterestingaswellaschallenging.火星上的生活，不仅有挑战性
19、，还很有趣。火星上的生活，不仅有挑战性，还很有趣。IwanttovisitAndrewaswellasMartin. aswellas意思为意思为“不但不但而且而且”我想去拜访安德鲁，还有马丁。我想去拜访安德鲁，还有马丁。 Sheshares(in)mytroublesaswellasmyjoys.她与我同甘共苦。她与我同甘共苦。 I.用括号内所给词的适当形式填空。用括号内所给词的适当形式填空。1.Thereislessair_(pollute)intownthatinthecity.2.LookatthenewestT-shirt.Itsmadeofcotton.Ithinkitwillbe
20、come_(fashion)thissummer.3.Its_(high)possiblethatpeoplecanliveonMarsinthefuture.4.Grandmaistooold_(settle)onanotherplanet.pollutionfashionablehighlytosettle5.Thehelmetismadeofmetal.Itstooheavy.WhenIwearit,Ifeel_(comfort).6.Myfathercooksverywell.Thefoodhecooksisas_(taste)asthatintherestaurant.7.Herea
21、remanykindsofmooncakesforyou_(choose)from.uncomfortable tastytochoose8._(compare)withwhathehadalready,thenewstampswerenotveryinteresting.9._(hope),doctorshavefoundanewwaytooperateonthepatients-flyinghospital.10.Weshouldkeepwaterfrom_(be)polluted.Compared Hopefully beingII. 翻译下列句子。翻译下列句子。1. 火星上的重力大约只
22、有地球上的八分火星上的重力大约只有地球上的八分之三。之三。ThegravityonMarsisonlyaboutthree-eighthsofthatontheEarth.2. 火星上的生活，不仅有挑战性，还很火星上的生活，不仅有挑战性，还很有趣。有趣。LifeonMarswouldbeinterestingaswellaschallenging.III. 阅读小短文，回答下列问题。阅读小短文，回答下列问题。Trueorfalse.1.TherewasliquidwateronMarslongago.2.ThewriterissurethatthereislifeonMars.3.Marshaseverythingneededforlife.4.ItiseasyformentostayonMars.TFFFHomework1.To make a list of the things that an astronaut uses2. Learn all the words in this class by heart.
