新选择性必修二UNIT5ADELICATEWORLDREVIEW课件

外研版英语选择性必修第二册

Unit5AdelicateworldMainlyrevisionforthisunit

本课件主要内容安排

课件内容1.单元构词扩展词汇2.单元核心词汇讲解3.单元专题语法讲解4.单元重点句型讲解

单元构词扩展词汇

dramatically

conservationimmunecomparision

mysterycriteriasecuritybiologicalecological

explosion

varyendangered单元重点短语✭词汇一appetiten.食欲，胃口，爱好，欲望◆教材原句Unfortunately,thecatssubsquentlydevelopedanappetiteforthebirds,too.不幸的是，猫科动物后来也对鸟类产生了食欲。◆要点必记

develop/create/arouseanappetitefor对…产生欲望;tosb'sappetite合某人的胃口;improve/promotetheappetite增进食欲;lackappetite缺乏食欲satisfyone'sappetite满足食欲跟踪训练1.Theirappetite__________newproductsalsocontributestoexcessivebuyingbutitisnotnecessaryforthem.2.Hehassuchabigappetite_________readingthatyouneverseehimwithoutabook.3.她有强烈的求知欲。（翻译）___________________________________4.Exerciseswillincreaseyourappetiteforfood.（翻译）________________________5.Hehas______strongappetiteforlearningonhisownandreading.Shehasagreatappetiteforknowledge.锻炼身体会增进食欲。

forfor

a✭词汇二multiplyv.(使)成倍增加◆教材原句Theymultipliedrapidlyandbeganeatingthenativevegetationanddiggingholes,whichcausedsoilerosion.他们迅速繁殖，开始吃当地的植被和挖洞，造成了水土流失。◆要点必记

multiplyvi.（快速）繁殖

multiply...by......乘以...multipliestheriskof...大大增加......风险◆考点呈现1.Three___________(multiply)byfourmakestwelve.2.Twomultipliedbyfour____________(equal)eight.3.Itispossibletomultiplythesebacteriainthelaboratory.(翻译)————————————————————multipliedequals在实验室里繁殖这些细菌是可能的。✭词汇三owev.欠（帐）

应该做；负有义务◆教材原句butwehumansoweittotheislandtogiveitahappyending.但我们人类有愧于这个岛屿，应该给它一个幸福的结局。◆要点必记

owesthtosb=owesbsth欠某人某物；归因（功）于...oweittosbthat-clause把...归于...oweittosbtodosth把...归于...owesbafavour欠某人一个人情

owingto...由于，因为跟踪训练1.Myheadteachergivesusmuchloveandcare,_________whomweowemanythanks.2.Ioweittohim____________Ihavesucceededinpassingthetest.3.Ithinkthatyoushouldoweittoyourself___________(get)someprofessionalhelpwithjob-hunting.4.HowmuchdoIoweyou_________thegroceries?5.Theisland'spresenteconomyowesagooddeal________tourism.6.Heowedhissurvivaltohisstrength___________aswimmer.

to

thattoget

for

to

as✭词汇四immunityn.免疫力◆教材原句Itturnedoutthattheydevelopedanimmunitytothevirus,andtheirnumbersexplodedonceagain.结果发现，它们对病毒产生了免疫力，它们的数量再次暴增。◆要点必记

immuneadj.有免疫力的；不受影响的；

beimmunetosth对...有免疫力；不受...影响；beimmmunefrom免除；受保护；

artificialimmunity人工免疫

animmunitytosth对...的免疫力跟踪训练1.Hewassostubbornthathewasimmune_______allsuggestions.2.Therulesaysthatnobodywillbegivenimmunity_______taxation.3.Childrenwhohavegottenthechickenpoxbuildanimmunity_____itsothattheydonotgetitasecondtime.4.Birdsinoutsidecagesdevelopan_________(immune)toairbornebacteria.5.Challengesareregularvisitorsinourlife,andnobodyisimmunetothem.(翻译)__________________________________________

immunity

to

from

to我们常常会遇到挑战，没有人会不受到它的影响。✭词汇五explodev.突然增加◆教材原句Itturnedoutthattheydevelopedanimmunitytothevirus,andtheirnumbersexplodedonceagain.结果发现，它们对病毒产生了免疫力，它们的数量再次暴增。◆要点必记explosionn.爆炸；爆发；激增abomb/nuclear/gasexplosion炸弹╱核╱气体爆炸;anexplosionofinterestinlearningChinese学习汉语的兴趣陡然上升；

explodeinto/with(anger)勃然(大怒);大发(雷霆);突然发生(危险);explodeintolaughter哄然大笑跟踪训练1.Aftertenminutesthegameexploded_________life.2.Weallexplodedintowild__________(laugh)whenweattendedtheteacher'slecture.3.The___________(explode)whichfollowedblastedoutthewallofherapartment.4.Doyoufearthatyou'llburstintotearsorexplode_________angerinfrontofher?5.Suchangerfilledherthatshefeltshemightexplodewithit.(翻译）__________________________________

intolaughter

explosion

with她怒火中烧，感到自己快要爆炸了。✭词汇六sessionn.一段时间，(会)期◆教材原句Theendofalectureisoftenfollowedbyashortquestion-and-answersession.讲座结束后通常会有一个简短的问答环节。◆要点必记insession在开会；在开庭；在上课aphoto/recording/trainingsession一次摄影，一场录音，一堂训练课等；inclosedsession秘密会议◆考点呈现

1.TheArabLeagueismeeting________emergencysessiontoday.

2.Itturnedouttobe_______interestingsessionwithalivelydebate.

3.Ithinkwe'velearnedalotaboutoneanotherinthissession.(翻译)

____________________________________________我认为这段时间我们相互有了很多了解。

in

an语法it用作形式宾语一.概述：

it常常可代替不定式，动名词短语或者从句，而将真正的宾语放在句子后面，以平衡句子结构。二.用法：it作形式宾语，主要分为下列几种情况:1.动词+it+adj/n.+(for/ofsb)+todosth；2.动词+it+nogood/nouse/useless/awasteoftime...+doingsth;3.动词+it+介词（to/forsb）that-从句；（eg.takeitforgrantedthat-clause）;4.动词+it+when(if)-从句（常见的有enjoy,hate,love,like,dislike,appreciate,prefer）。

跟踪训练

1.Wereallyappreciate___________whensheofferedtohelpatyourearlierconvenience.2.Wethinkitnouse_______________(complain)ifyoudonothing.3.Youcanputit_________itwasarrangedbefore.4.Idon’tfeelitdifficult_______________(understand)theSpecialEnglish.5.Theyfound_______pleasantthattheyworkedwithusChinese.6.Ileaveittoyourownjudgement__________youshoulddoit.7.Hemakesitarulenever_____________(borrow)money.

complaining

it

that

tounderstand

it

whether

toborrow

单元重点句型1

1.Norwouldtheyfailtoimaginehowitsnativeinhabitants,includingroyalpenguins,andelephantseals,existedinperfectharmonywiththeirnaturalhabitat.他们也不会忘记这里的土著居民，包括皇家企鹅和海象，是如何与他们的自然栖息地和谐共存的。【句型分析】

否定副词nor位于句首，句子须用部分倒装语序。【句型拓展】a.

当含有否定意义的词或者短语在原句中作状语时，句子须用部分倒装语序。部分倒装语序常常采用一般疑问句序，即：否定词+be/助动词/情态动词+主语+谓语....b.这样的否定词有：never/neither/seldom/hardly/rarely/scarcely/bynomeans/innoway/atnotime等。跟踪训练1.Iwillneverknowwhatwasinhismindatthemoment,_______________willanyoneelse.2.Seldom__________itoccurtothemtowanderabit,totakeamomenttoseewhatwasaroundthem,3.Nor_______IknowwhatdrivesmetobehaveasIdousually,forIjustsitthereinsilence.4.I'vetriedhardtoimprovemyEnglish.Butbynomeans_______theteachernotsatisfiedwithmyprogress.5.Onlythen________sherealizehowmuchdamagehadbeencaused.

neither/nordid

do

isdid

单元重点句型2

2.Recentyearshaveseenmoreandmorepetslidersescapingorbeingreleasedfromhomes,andsomeownersbelievetoreleasethemintothewildisnobigissue.近年来，越来越多的宠物溜出家门或被放生，一些主人认为把它们放生到野外不是什么大问题。【句型分析】

本句中，see意为“见证，目睹，经历”，主语为recentyears,最近这些年见证了....【句型拓展】

see意为“见证，目睹，经历”时，常常用时间或者地点的名词作主语，表示某时间或地点“见证，目睹，经历”了某事。类似的词还有：find/witness/say/experience等，这些词以物作主语，表示一种拟人的手法，使得语言更生动。理解应用1.Thelast30years_____________(see)thegreatnumberofl