仁愛英語八年級上Unit4Topic1導(dǎo)學(xué)案

Unit4OurWorldTopic1PlantsandanimalsareimportanttousSectionA第一部分知識導(dǎo)學(xué)形容詞的比較級和最高級一、概念：當(dāng)我們要表達(dá)“更…”和“最…”時，就要用到形容詞的比較級和最高級。如：I’mtallerthanyou.我比你高。Heisthetallest.他是最高的。二、形式變化1.規(guī)則形容詞比較級是在形容詞后加er如：tall–tallerlong–longerstrong–stronger最高級是在形容詞后+est如：tall–tallestlong–longestfresh–fresheststrong—strongest2.但要注意三個情況：一是如果以重讀閉音節(jié)結(jié)尾（輔元輔），則要雙寫最后一個字母+er/est.如：big–bigger–biggesthot–hotter–hottestfat–fatter–fattest二是以輔音字母+y結(jié)尾要把y變i+er/est如：easy–easier–easiestearly–earlier–earliesthappy–happier–happiest三是以字母e結(jié)尾則只加r/st如：nice–nicer–nicestlate–later–latestfine–finer–finest3.以上變化是單音節(jié)或部分雙音節(jié)單詞的變化，如果是多音節(jié)單詞（比較長的單詞），則是在前面加more來構(gòu)成比較級，加most來構(gòu)成最高級。如：delicious–moredelicious–mostdeliciouspopular–morepopular–mostpopularfamous–morefamous–mostfamousinteresting–moreinteresting–mostinteresting4.還有一些形容詞的比較級和最高級變化是不規(guī)則的，需要單獨記憶如：good/well–better–bestbad/ill–worse–worstmany/much–more–mostlittle–less–leastfar–farther–farther三、用法1.比較級用法：通常，只要將兩個人或事物進(jìn)行比較時，就要用比較級，有時會給出明確的比較對象。如：Heistallerthanhisfather.而有時則是暗含比較含義，沒有給出比較對象，這時也要用比較級，如：Ifeelbettertoday./Ifyouworkhard,youcangethighergrades.大多數(shù)情況下，我們可以通過以下句型來判斷一定用比較級。①后面有than，因為than本身是“比”的意思，后加比較對象，自然前面的形容詞要用比較級。②前面有much/even/alittle修飾時，much/even/alittle這些詞用來修飾形容詞時，只能修飾形容詞的比較級，那么自然當(dāng)這些詞出現(xiàn)時，后面一定加形容詞的比較級。.:Hefeelsmuchbettertoday.Icandoevenbetternexttime.③選擇疑問句。.:Whichdoyoulikebetter,cyclingorrowing?Whoistaller,Michaeloryou?④前句出現(xiàn)比較對象。.:It’stoldtoday,anditwillbecoldertomorrow.⑤當(dāng)表達(dá)越來越…時，兩個形容詞都要用比較級。.:Theweathergetscolderandcolder.如果是多音節(jié)形容詞，則在形容詞前加moreandmore就可以。Englishbecomesmoreandmoreimportant.2.最高級的用法：當(dāng)三個以及三個以上人或事物比較時，用最高級。要注意的是，形容詞最高級前必須加定冠詞the。我們可以通過以下句型來判斷，形容詞一定要用最高級。①后面有in+范圍時。.:Heisthetallestinourclass.BeijingisthebiggestcityinChina.②后面有of+thethree/all時。（三個、所有當(dāng)中）.:Thisoneisthemostdifficultofthethreeproblems.Russiaisthebiggestofallthecountries.③當(dāng)選擇疑問句有三個或更多選項時。.:Whichisthehighestmountain,MjoutTai,MountHuaorMount④在oneof后面常加形容詞最高級。LiuXiangisoneofthebestrunnersintheworld.⑤在序數(shù)詞后+形容詞最高級。TheYellowRiveristhesecondlongestriverinChina.練習(xí)：1.–Whatahotday!--Theweatherreportsaysitwillbeeven____________tomorrow.(hot)2.Whichis__________,anelephantoratiger?(strong)3.Whichis__________,spring,autumnorwinter?(cold)4.–IthinkLiMingisthestrongeststudentinourclass.--Iagreewithyou,butwhoisthesecond_________one?(strong)5.–Tim,doyouthinktimeismoney?--Yes,butIthinkitis___________thanmoney.(important)第二部分課堂任務(wù)任務(wù)一：I2a，聽錄音，選擇方框中適當(dāng)?shù)脑~，并用其適當(dāng)形式填空。blue,clear,green,fresh,quietWangWeilikesthecountrysideverymuch.Hethinkstheairis____________,theskyis____________,andtherearealso___________threesand____________riversthere.Michaelthinsitis________________,too.Andpeoplecanenjoythebeautiesofnature.WangWeigoesthereforhissummervacationeveryyear.II.讀對話，翻譯下列短語1.思考，考慮___________________2.鄉(xiāng)下的生活______________________3.thebeautiesofnature________________4.thatmustbefun________________任務(wù)二：I2a，讀對話，補(bǔ)全下面的句子。1.Thedogthinksit’s______________onthisfarm.2.Thepigis____________and__________thanthedog.3.TheRabbitis________________thanthedog,butit’s_________________.4.Thehorseismuch_______________thantheRabbitanditthinksit’s________________ofall.5.Thecowisalittle______________thanthehorse.II看圖，用2b方框中詞的適當(dāng)形式補(bǔ)全下面的句子。1.Thecatis______________thanthemouse.2.Thehenis______________thanthegoose.3.Therabbitis______________thantheduck.4.Thepigis_____________thanthedog.5.Thecowis______________ofall.6.Thehorseis________________ofall.7.Themouseis________________ofall.III寫出2b中形容詞的比較級和最高級。SectionB第一部分知識導(dǎo)學(xué)1.aboveprep.在…上/高出….Eagles(鷹)flyabovethewhiteclouds.[拓展]above,over與on的區(qū)別above表示在某一物體上方，或高出某一事物，但不一定是正上方。反義詞是below.over表示在某一物體的正上方或覆蓋在某一物體上。反義詞是underon表示在某一物體上面，表面互相接觸。第二部分課堂任務(wù)任務(wù)一：I.1a,聽錄音，不全下面的句子。Michaellikesanimals____________thanplants.Hethinksanimalsare________andtheygiveus__________.WangWelikesplants___________.Hethinksrosesarethe____________ofalltheflowers.Marialikesbirds.Theyarealso___________,andtheycansingtous.Janelikescats___________becausetheyare__________thanotheranimals.Kangkanglikes___________plantsandanimals.Asweknow,theyareboth____________tous.We__________thesameworldwiththem.II.讀對話，翻譯下列習(xí)語，并完成任務(wù)。1.thephotosabove________________2.更喜歡_________________3.ofalltheflowe3rs________________4.both…and…_________________5.眾所周知_________________6.sharethesameworld_______________7.文中“Ithinkrosesarethemostbeautifulofalltheflowers.”意思是_______________________________,這句也可以表達(dá)為“我認(rèn)為玫瑰比其他任何花都漂亮。”那么用英語說就是：Ithinkrosesare_______________________________anyotherflower.8.文中“theyarecuterthanotheranimals.”意思是_________________________,也可以表達(dá)為：“他們是所有動物中最可愛的?！庇糜⒄Z說就是：Theyare________________ofalltheanimals.9.通過上兩句，我們可以得出，最高級+ofall…,通?？梢赞D(zhuǎn)換為_________+than(any)other…練習(xí)：Heisthetalleststudentofall.(同義句轉(zhuǎn)換)Heis______________________________.III1c.用方框中所給提示，兩人一組互相問答。（注意，練一個比較級，再練一個最高級）任務(wù)二：2，I看圖，用適當(dāng)?shù)膯卧~不全短文。II聽錄音，檢查答案并翻譯。1.manydifferentkindsof…_________________2.livingthings_____________3.feedon…____________SectionC課堂任務(wù)任務(wù)一、1a,I讀課文，完成下面的要點解析并翻譯習(xí)語。1.第一句中的cover,意為_____________,其同意表達(dá)為spreadover.2.thousandsof意為_______________,注意在這個短語中，thousands是__________形式。舉一反三，數(shù)以百計/成百上千應(yīng)該說______________,數(shù)以百萬計應(yīng)該說_______________.3.文中6%，英語讀法為sixpercent,z在英語中百分之幾，只需要在基數(shù)詞后加percent就行。短語6%oftheearth’ssurface,意為_______________。4.manyofthem_______________5.離地面超過30米___________________6.beimportantto_______________7.thelungsoftheearth_______________8.andsoon_______________9.smallerandsmaller___________________II讀課文，回答下面的問題。1.Doyouthinktherainforestsbigorsmall?Whydoyouthinkso?______________________________________________________2.Aretheremanyanimalsinrainforests?Wheredotheylivein?______________________________________________________3.Whatisitlikeinrainforests?_______________________________________________________4.Whyarerainforeststhelungsoftheearth?_______________________________________________________5.Whatcanwegetfromrainforests?_______________________________________________________6.Whathappenstorainforestsnow?whatshouldwedo?_______________________________________________________III.根據(jù)上面的問題復(fù)述課文。任務(wù)二、2a，2b，讀四段短文，翻譯下列習(xí)語并完成1b。1.benecessaryfor…________________2.can’tliveatallwithoutwater_______________________3.infact_______________4.makeup_______________5.thelargestpartof___________________6.mostpartsof_______________7.everydropofwater__________________任務(wù)三：I3，按照正確的種樹的順序給句子排序，并翻譯四個句子和習(xí)語。1._________________________________________.makesure_____________.2._________________________________________.Keepitstraight___________.3._________________________________________.fill…with…_____________4._________________________________________.II看著漢語，復(fù)述種樹的四個步驟。SectionD課堂任務(wù)任務(wù)一：1.I讀課文翻譯習(xí)語。1.animalsindanger________________2.thinkof___________________3.lessandless________________4.fewerandfewerinnumber_______________5.theoldesttypeof