In the lab英语教案
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教学目标
1.owledge:wordsandusefulexpressions
Firstofall,once,unless,cupboardelectricityturnoff,shut,bythesideof,soap,taste,oil,mix,mixture,rather,finger,insteadof,second(n),onholiday,message,properAllow,experiment,basin,finally,lively,sadly,request,Petrol,castor,vinegar,dip,suck
2.MoralEducation:Togetthestudentstodoeverythingascarefullyastheycan.
3.EmotionalEducation:
Tosupplythestudentswithaveryharmoniousatmosphereinorderthattheycanhaveasuccessfulunderstandingofthetextanddiscussion.
MainPoints:ToletthestudentsmasterandusefreelysomeoftheusefuleverydayEnglish.
1.Herearesomedosanddon''''ts.2.Followtheinstructions.
3.What/Howaboutwhenweleave?4.Makesurethat......
5.Dowhatheorshetellsyoutodo.6.Pleasetidythelab.
7.Couldyoupleaseshowmehowtousethecomputer?
8.Don''''ttouchanything.
DifficultPoints:
1.Toencouragethestudentstodiscussandthenaskthemtodemonstratetheirideasbyusingtheimperativesentencestructure.
2.ToreviewandmasterthesentencestructureofDirectandIndirectSpeech.
3.once/unless/as连接的主从句
教学建议
Sincethedialogueandthetextofthisunitareaboutchemistry,theteachermayasksomequestionsaboutchemistryorothersubjectstoleadinthedialogueandthenshowthestudentsthetollsthatareusedinthechemistrylabwhenthetextistaught.
Andalsoinordertomaketheclassverylivelyandinterestingtheteachermayborrowthetubeswhicharefilledwiththreekindsofliquidsfromthechemistrylabandaskthemtoguesswhat''''sinthetubesandthenaskthemtowatchtheteachercarefullythendowhattheteacher.
Does,whichisthecontentofthetext.InthiscasethestudentsmayfeelverynewandtheymaybeinterestedinEnglishclass.
Inordernottocausesomethingdangeroustohappen,theteachermayfillsomewhitevinegar（白醋,somecookingoil(香油),somealcohol(白酒)inthetubes.
重点词汇讲解
1.firstofallmeansfirst.意为首先，第一
Firstofall,IwanttosayI''''mveryhappytobeherewithYou.
Firstofall,wemustmakeadecision.
相关的词组：atfirstwhichisoppositeto"atlast"forthefirsttime第一次
2．allow的用法
allow+noun.
allowsb.todo/nottodosth../sb.isallowedtodo
allow+doing
(1)Heallowednonoisehere.
(2)Heallowedhisboytospendtheweekendwithhisfriends.
(3)Whydidyouallowhertosmokehere?
(4)Wedon''''tallowdrinkingatschool.
3.once是连词，作“一旦……就……”讲。
(1)Onceshearrives,wecanstart.
(2)Onceyourealizeit,youwillstudyhard.
(3)Onceseen,itcanneverbeforgotten.只要见过一次就难以忘怀。
注意once一般和现在时连用。
4.unless是连词，相当于if……not……
(1)Hewillnotcomeunlesshishomeworkisfinished.==Hewillcomeifhishomeworkisfinished.
(2)Youwillbeintroubleunlessyoufollowmyinstruction.==Youwillnotintroubleifyoufollowmyinstruction.
unless和not…until的区别
unless引导从句时多强调条件，而not……until句型则强调时间。Unless连接的主从句的时态一般是主句是将来时而从句现在时。not……until连接的主从句中可以使用多种时态。
比较：
(1)Youwillfailintheexamunlessyoulistentotheteachercarefullyinclass.
(2)Wewon''''tstartuntilBobcomes.
(3)Hedidn''''tfindoutwhathadhappeneduntilhiswifetoldhimaboutit.
5.Don''''ttouchanythingunlessyourteachertellsyoutodo.
在此句末的to后省略了touch。在英语里，有些动词像hope,like,want,try,need,助动词如beableto.,begoingto之后，为了避免前后重复，往往只用一个to代表动词不定式。
(1)Youcangowithmeifyou''''dliketo.
(2)Youmaystayathomeifyouwantto.
(3)Idon''''twanttogothere,buthe''''sgoingto.
6.Whataboutwhenweleave?
Whatabout……?与Howabout……?可以用来询问消息、提出建议或征询意见，其后可接名词、代词、动名词、副词（如next）和状语从句等。
(1)I''''mready.Whataboutyou?
(2)Whataboutplayingfootball?
(3)Whatabouttoday''''smatch?
7.makesure后跟了一个省略了that的从句。当表示“弄确实、使确定”意思时，常用在祈使句中，其后的从句里要用一般现在时。当makesure表示“认为、确信”的意思时，其后的从句时态可视情况而定。
(1)Makesure(that)youcomeearlytomorrow.
(2)Makesure(that)yourroomisclean.
(3)Wemadesureyouwerenotcomingtoday.我们认为你今天一定不来了。
8.turnoff其反义词是“turnon"
turnup(开大)其反义词是turndown(关小)
9.attheendof/intheend
attheendof意为“在……末，在……尽头”，既可以表示时间的概念也可以表示空间的概念。而intheend只能表示时间的概念,其后不能接of短语，相当于finally,atlast.
(1)Attheendofthistermwewillhaveafinalexamination.
(2)Hediedintheendthoughthedoctorstriedtheirbest.
(3)Thereisahospitalattheendofthisroad.
10.with表示“具有，带有”
(1)Chinaisacountrywithasplendidcultureandalonghistory.
(2)Mr.Smithisamanwithtwosons.
(3)Iliveinahousewithtwowindows.
11.YoumustdoeverythingasIdo.
as为连词，表示方式，意思是“按照、如同”
(1)Statethefactsastheyare.要如实地陈述事实。
(2)Whydidn''''tyoudoasIasked?
like/as的区别
like表示“像、如同”的意思是介词，其后不能跟从句。而as是连词，要接一个从句。as当作介词时表示“作为”。
(1)Hedoesn''''tspeakasothersdo.(如、像)
(2)Hehasabignoselikehisfather.像）
(3)HeworksintheschoolasateacherofChinese.（作为）
12.insteadof/instead
insteadof是介词短语。意思是“代替、而不是”。其后可以接动名词、不定式、介词短语和名词、代词。可放在句首或句尾使用。
(1)Ifyouarebusy,letmegoinsteadofyou.
(2)Theywentthereonfootinsteadofbybus.
(3)ThissummerIwenttoQingdaoinsteadofgoingtoBeijing.
instead是副词。试比较。
(1)Parentsshouldgivetheirchildrenmoreadviceinsteadofmoney.
(2)Heneverstudies.Instead,heplaysalldaylong.
(3)Thestudentsdidn''''tsmile.Instead,eachofthemmadeaface.
13.taste/smell/sound/look/feel等感官动词的用法。其后必须加形容词。
(1)Theflowerssmellverynice.
(2)Theoldwomanlookedveryworried.
(3)Theclothfeelsverysoft.
(4)ThefoodtastessodeliciousthatIcantwaitanylonger.
14.Noneofyouwatchedcarefullyenough.
none为不定代词，意思是“没有一个人或物”。none做主语指代可数名词时，其谓语动词单复数形式都可以，但是当它指代不可数名词时，其谓语动词为单数第三人称形式。none常与表示范围的of介词短语连用并表示全部否定。
(1)Noneofthemhas/havegotabike.
(2)Noneofusis/areafraidoftheghosts.
(3)Noneofthismoneyismine.
(4)---Howmanyapplesdoyouhave?---None.
none/noone的比较
none既可以指代人也可以指代物，强调数量，可以用来回答howmany开头的问句。而用法与意思基本相同的noone(nobody)只能指代人，它们不强调数量，可以用来回答who开头的问句。
(1)----Howmanypeoplecanyouseeinthepicture?-----None.(一个也没有)
(2)---Whoisintheclassroom?----Noone.(Nobody)（没有人）
15.enough的用法
enough+noun./adj./adv+enough
enough可指代可数名词或不可数名词，其谓语动词形式可依据它指代的名词的数来定。
(1)Enoughhasbeensaidonthissubject.在这一点上说的已经够多的了。
(2)Enoughweresenttohim.Henolongerwantedtohavesuchbooks.
(3)----Wouldyoupleasehavesomemore?----No,thanks.I''''vehadenough.
(4)Iamafraidwehaven''''tgotenoughtimetodothework.
(5)You''''reoldenoughtolearntodressyourself.
