仁爱英语九上Unit4-Topic3单词、词汇、重点句型、语法和交际用语等复习课件.ppt

Unit4FantasticScience,Topic3PerhapspeoplewillflytoMars.,一。重点词汇,researchbasicwaterproperriskstormbeyondscientificadmirelimitSolaruniversegravityoxygenclimatespacesuitviewtelescope,n.研究，调查adj.基本的，基础的v.浇水,adj.恰当的，合适的n.冒险；风险n.风暴，暴（风）雨prep.(表示位置)在的那边adj.科学的v.钦佩，羡慕v.限制，限定n.太阳系,n.宇宙n.重力，地心引力n.氧气,n.气候,n.航天服，太空服n.风景；看法n.望远镜,二。重点短语,1.hefuture3.inorderto4.ontheradio5.takepartin6.growup7.preferto8.Whatsworse9.beworthit10.atadistanceof11.sendsbamessage,乘宇宙飞船旅行将来为了通过收音机参加成长、长大喜欢胜过更为糟糕的是有好处，值得一干相隔给某人发送信息,三。重点句型,1.Idontthinkalienscanbefoundinspace.我认为外星人不可能出现在太空里。(1)当think,believe,suppose,imagine,expect等动词后的宾语从句含有not的否定词时，该否定应移至主句，即否定主句的谓语动词。如：Idontthinkitwillraintomorrow.我认为明天不会下雨。如果主句的主语是第二、三人称，否定式一般不转移。如：Hesupposestheywontwinthegame.他猜想他们赢不了比赛。(2)can+be+过去分词，是情态动词构成的被动语态。如：Thiscantbedoneinashorttime.这不是短期内能完成的。2.IthasbeentwodayssincewelandedonMars.自从我们登上火星以来已经两天了。it用作主语谈论时间，常与since连用。如：Itis(或hasbeen)threeyearssinceweleftschool.自从我们离开学校以来已经三年了。,3.Whatsworse,ourwatersupplieswereverylow.更糟糕的是，我们的水供给是非常有限的。Whatsworse更糟糕的是。类似结构还有：Whatsmore更有甚者；更为重要的是。4.Itsaquarterasbigastheearth.它是地球的四分之一大。倍数表示法：倍数+as+形容词/副词+as如：Thisboxisthreetimesasheavyasthatone.这只箱子是那只箱子的三倍重。5.Marsgoesaroundthesunatadistanceofabout228millionkilometers.恒星在相隔大约228000000千米的地方绕着太阳转动。(1)atadistanceof相隔(2)atadistance在远处。如：Themoongoesaroundtheearthatadistanceof380000km.月球在距地球38万千米的地方绕地球旋转。Thepolicefollowedhimatadistance.警察远远地跟着他。,四。重点语法,1、情态动词的被动语态:是由“情态动词+be+及物动词的过去分词”构成。如：Alienscannotbeseenontheearth.在地球上不可能见到外星人。Otherplanetsmaybevisitedsooninthefuture.将来其他的星球也会有人登陆。Scientificresearchshouldbedonecarefully.应该认真地进行科学研究。Thesetreesmustbewateredintime.这些树应该及时浇水。,书面表达技巧善于衔接。一篇好作文不仅是词汇、句子的简单罗列，语句间如缺乏必要的连接过渡和照应，作文就会结构简单，句式单调，缺少灵气，而看似不显眼的衔接过渡可大大增强作文的连贯性，逻辑性和可读性。常见的语篇衔接成分见下表：逻辑关系语篇衔接成分时间关系first(ly),second(ly),then,finally,suddenly,immediately,after,until,themoment,while空间关系infrontof,across,above,nearby,atthebackof,nextto,ononesideontheotherside对称关系ononehandontheotherhand,foronethingforanother转折关系but,however,yet,while,though,otherwise,ratherthan,nomatterwhat,ontheotherhand,因果关系becauseof,thanksto,because,since,as,forthis/thatreason,asaresult,so,therefore.条件关系aslongas,if,unless,ifnecessary增补关系besides,inaddition,notonlybutalso,aswell,whatsmore,whatsworse举例forexample/instance,suchas,like,namely,inotherwords评价asfarasIknow,thereisnodoubtthat,Imnotsurethat,Itscertainthat,asweknow,Itsknowntoallthat,总结inaword,nextto,inshort,ingeneral,inall,tosumupGenerallyspeaking,there