初三英语Unit2DNA(Lesson9-Lesson12)一.本周教学内容:Unit2DNA(Lesson9—Lesson12)1.重点单词。n.muledonkeyblueprinttwincloneegginsectv.combineidentifyclonedividedesigndamageadj.juicyhelpfulidenticaloriginaladultadv.exactly2.重点短语。humanbeing人类exceptfor除……之外notonly…butalso…不但……而且……atthesametime同时Whatif…?如果……将会怎么样?forexample例如3.交际用语。AbilityandInability.Hecanrideabike.Brianisgoodatfootball.ScientistcantakeDNAfromonekindofanimal.Theycan’tcombinetheirDNA.Howfarcanyoujump?CanItakeaplanetothebakery?二.重点、难点解析及词语辨析。1.Iwouldcombineadonutandapizza.我想组合一个面包圈和一张比萨饼。(L9)combinev.(使)联合,(使)结合①Weshouldcombinetheorywithpracticeinourstudy.在学习中,我们应该把理论和实践相结合。②Thetwosmallshopscombinedtomakealargeone.这两个小店合并起来成为一个大商店。注意:combine着重指“结合为一”,而connect指不紧密的“联系”,被联系者仍保持着自己的特性。③BritainandFranceareconnectedbyanunderseatunnel.英国和法国被一条海底隧道连接起来了。2.IthinkIwouldcombinegrapesandbananas.我认为我应该组合葡萄和香蕉。(L9)would是will的过去式,指过去,也可指现在,语气较缓和、委婉。①表示意愿(主要用于第一人称,常用于间接引语,指过去的将来)。Ifyouwouldstandbyme,Ishouldhaveanothertry.如果你肯支持我,我就再试一次。②表示过去习惯或反复发生的动作。Duringthevacationhewouldvisitmeeveryweek.放假期间,他每周都来看我。③表示请求、建议(用于疑问句)比will委婉、客气。WouldyouliketovisitthePalaceMuseum?你想去参观故宫博物院吗?3.Icouldhavebreakfastandlunchatthesametime.我可以把早饭和午饭同时解决。(L9)atthesametime同时,然而,但是①Thisisadifficultproblem,atthesametimeitisveryinteresting.这是个很难的问题,但却很有趣。②TheyarrivedatShanghaiatthesametime.他们同时抵达了上海。4.Iwouldcallthem“grananas”.我要叫它们“grananas”。(L9)call+宾+宾补(宾补常为名词)“称呼;叫做”①HisfriendscallhimJoe.他的朋友称他为乔。②Hecalledfromdownstairs.他在楼下喊叫。③I’llcallonyoutomorrow.我明天来拜访你。④Hesaidhewouldcallatnoon.他说他要在中午打电话。提示:△callvt.“喊叫;叫醒”⑤CallmeatsixtomorrowmorningifI’mstillsleeping.如果我明早六点还睡着,你就叫醒我。△call+宾;或call+间宾+直宾;或call+直宾+for+间宾,“呼唤;召唤;召集”⑥Motheriscallingme.母亲在叫我。⑦Theheadmastercalledalltheteacherstoameeting.校长召集全体教师开会。⑧Pleasecallmeataxi.(=Pleasecallataxiforme.)请给我叫一辆出租汽车。5.Whatifyoucouldcombineotheranimalsorplantstomakesomethingnew?如果你能组合其他的动物或植物成新的东西怎么办?(L9)Whatif…?“如果……该怎么办呢?如果……又有什么关系?”①Whatifyoushouldfail?假如你失败了该怎么办呢?②Whatiftheysucceed?假如他们成功了又有什么关系?6.Aretheredifferencebetweenyouandhim?你和他之间有不同吗?(L10)辨析:between与amongbetween常用于两者之间,among一般指三者或三者以上,如果指三个以上的人或物的每两个之间时,仍然要用between。①IsitbetweenLilyandJenny.我坐在莉莉和詹尼之间。②Theyliveamongthemountains.他们住在群山之中。7.Youuseittobuildahouse.你用它来建房子。(L10)use的用法①use…todosth.=use…fordoingsth.用……做某事Heisusingaknifetocutbread.=Heisusingaknifeforcuttingbread.他正用小刀切面包。②Itisnousedoing(todo)…做……是无用的(无益的)Itisnousecryingoverspiltmilk.不要为打翻的牛奶哭泣。(错误已铸成,悔之无益)注意:usen.用途Thisknifeisnouse.usefuladj.有用的Thisisanusefulbook.8.Exceptforidenticaltwins,eachlivingthinghasitsownuniqueDNA.除了双胞胎之外,每个...