Unit5Lesson29DNATheStoryofYou學(xué)案初中英語(yǔ)冀教版九年級(jí)全一冊(cè)

Unit5Lesson29DNA—TheStoryofYou【學(xué)習(xí)目標(biāo)】1.通過(guò)基礎(chǔ)練習(xí),能記住并正確使用本課時(shí)的重點(diǎn)單詞和重點(diǎn)短語(yǔ)。2.通過(guò)有效地呈現(xiàn)本課時(shí)內(nèi)容,能夠理解課文內(nèi)容并回答課后的問(wèn)題。3.通過(guò)小組合作活動(dòng),能夠用英語(yǔ)向他人介紹自己所知道的有關(guān)DNA的知識(shí)?！绢A(yù)習(xí)導(dǎo)學(xué)】一、單詞速記1.脫氧核糖核酸

2.藍(lán)圖

3.一般的;普遍的

4.復(fù)雜的

5.雙胞胎之一

6.重復(fù);復(fù)述;背誦

7.模式;形式

8.確認(rèn);鑒別

9.有關(guān)的;相關(guān)的

10.孫子;外孫

11.孫女;外孫女

12.指示;說(shuō)明

二、短語(yǔ)速記1.ingeneral 2.exceptfor 3.beesick 4.beableto 5.例如 6.和……相同的…… 7.與……相關(guān) 8.數(shù)十億計(jì)的;大量 三、想一想1.文中介紹了什么是DNA?______________________________________________________________2.科學(xué)家們可以通過(guò)你的DNA鑒別什么?______________________________________________________________【答案】一、1.DNA2.blueprint3.general4plex5.twin6.repeat7.pattern8.identify9.related10.grandson11.granddaughter12.instruction二、1.一般而言;通常2.除……之外3.生病4.會(huì);能5.forexample6.thesame...as7.berelatedto8.billionsof三、1.DNAistheblueprintoflife.2.FromyourDNA,scientistscanidentifynotonlyyou,butalsopeoplewhoarerelatedtoyou.【合作探究】任務(wù)驅(qū)動(dòng)一單詞、短語(yǔ)大闖關(guān)1.齊讀本課重點(diǎn)單詞和短語(yǔ)。2.用方框內(nèi)所給單詞的適當(dāng)形式填空。instructiontwinrepeatgrandsongeneral(1)LucyandLilyare.Theylookthesame.

(2)Readthebeforeusingthenewphone.

(3)Thesedifficultiesareamongpeopleofhisage.

(4)Ican'tfollowyou,Tony.Pleasethesentence.

(5)ThelittleboyisMr.King's.

3.ShowLet'sDoIt!2.Fillintheblankswiththephrasesinthebox.ingeneralexceptfornotonly...butalsorelatedtoevenifthesame...as(1)Yourhomeworkisquitegoodafewspellingmistakes.

(2)theyoungtheoldlikepopmusic.

(3)Kate'shairiscolourhersister's.

(4),womenlivelongerthanmen.

(5)manydifficultiesremain,wecanoverethem.

(6)Iswealthhappiness?

任務(wù)驅(qū)動(dòng)二聽力訓(xùn)練1.Listentothelessonandfillintheblanks.(1)forsometwins,everylivingthinghasitsownuniqueDNA.

(2)SomeproblemscanbecausedbyproblemsinyourDNA.

(3)YourfingerhastheDNAasyourhair.

(4)FromyourDNA,canidentifynotonlyyou,butalsopeoplewhoarerelatedtoyou.

(5)DNAisoneoftheamazingthingsontheearth!

2.ShowLet'sDoIt!1.Readthelessonandanswerthequestions.3.反復(fù)聽錄音并跟讀。熟記課文,掌握文章各段的大意,并借此來(lái)復(fù)述課文,訓(xùn)練口語(yǔ)表達(dá)。任務(wù)驅(qū)動(dòng)三小組活動(dòng)1.ShowLet'sDoIt!3.pletethelessonwiththesentencesinthebox.2.Discussion.IsitagoodideatochangetheDNAofthefoodweeat?Dividethestudentsintotwogroups.OnegroupsupportitisagoodideatochangetheDNAofthefoodweeat.TheothergroupsaysomethingaboutthedisadvantagesofchangingtheDNAofthefood.【答案】任務(wù)驅(qū)動(dòng)一2.(1)twins(2)instructions(3)general(4)repeat(5)grandson3.(1)exceptfor(2)Notonlybutalso(3)thesame(4)InGeneral(5)Evenif(6)relatedto任務(wù)驅(qū)動(dòng)二1.(1)Except(2)health(3)same(4)scientists(5)most【知識(shí)超市】[命題點(diǎn)]Exceptforsometwins,everylivingthinghasitsownuniqueDNA。除了同卵雙胞胎之外,每個(gè)生物都有自己獨(dú)特的DNA.

短語(yǔ)exceptfor意為“除……之外”。如:Thecityisgoodexceptfortheweather.除天氣外,這座城市還不錯(cuò)。辨析:exceptfor、except、besides和butexcept意為“除了”,強(qiáng)調(diào)不在其中,指從同類事物的總體中除去一部分exceptfor意為“除了”,表示對(duì)主要部分的肯定以及對(duì)局部的否定besides意為“除了……之外(還有)”,后面接名詞、代詞、或動(dòng)名詞,但不能接從句but意為“除……外”,強(qiáng)調(diào)不在其中,與except可互換,多與no、nobody、who、where、all等連用對(duì)點(diǎn)自測(cè)根據(jù)漢語(yǔ)意思完成句子。1.他是個(gè)好人,除了有點(diǎn)脾氣壞。Heisagoodman