九年级英语上册 unit 4 topic 3 what do you know about mars section c导学案（新版）仁爱版

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1、Unit4Topic3WhatdoyouknowaboutMars【学习目标】了解更多关于火星的知识。【预习案】一、读1a的内容，完成1b二、在文中找到并划出下面的短语1.benamedafterMars__________________________2.theRomangodofwar________________________3.53%aswideas______________________________4.相隔…____________________________________5.覆盖火星的整个表面__________

2、______________6.仅仅36公斤重_____________________________7.和…的2/5一样重__________________________8.彼此距离最近________________9.搜寻更多信息____________________10.ausefulplacetodryfruit_______________________11.agoodplaceforhumanbeingstolive___________12.acomfortableplaceforheavypeople________

3、___________________________________13.水的供应____________________________________14.限制水的使用________________________________15.思念家人____________________________________【探究案】在文中划出下面的句子并分析1Itsdiameteris53％aswideasthatoftheearth..译：__________________________________________________点拨

4、：as﹢形容词/副词原级﹢as﹢名词---像…一样…思考：句中that指代______________,如果前面的名词是复数，用_________指代练习：a.我们学校像花园一样美。Ourschoolis__________________________apark.b.Tom和Mike跑得一样快。Tom______________________________Mike.c.美国的人口没有中国多。ThepopulationinAmerica__________________________inChina.d.城市的楼比农村的高。Thebui

5、ldingsinthecity______________than_________inthecountry.2.Marsgoesaroundthesunatadistanceofabout228millionkilometers.译：_______________________________点拨:atadistanceof---相隔…拓展：at/fromadistance---在远处练习：a.Putthestoneatadistanceofabouttwentymetershere.译：__________________________

6、____________b.Thepolicefollowedhimatadistance.译：____________________________________________________3.ThegravityonthesurfaceofMarsisabouttwo-fifthsasstrongasitisonearth.译：_______________________________________________________________________________点拨：倍数词/分数/百分数﹢as﹢形容词或副词原级

7、﹢as---是…的几倍/几分之几/百分之几练习：a.这个盒子是那个盒子的四倍重。Thisboxis______________________________thatbox.b.这个房间是那个房间的三分之一大。Thisroomis_____________________________thatroom.4.Soapersonwhoweighs90kilosonearthweighsonly36kilosonMars.译：______________________________________________________________

8、____点拨：apersonwhoweighs90kilosonearth---一个重达90公斤的人思考：句中第一个weighs是___句的_____