资源描述
In the lab英语教案
教学目标
:wordsandusefulexpressions
Firstofall,once,unless,cupboardelectricityturnoff,shut,bythesideof,soap,taste,oil,mix,mixture,rather,finger,insteadof,second,onholiday,message,properAllow,experiment,basin,finally,lively,sadly,request,Petrol,castor,vinegar,dip,suck
:Togetthestudentstodoeverythingascarefullyastheycan.
:
Tosupplythestudentswithaveryharmoniousatmosphereinorderthattheycanhaveasuccessfulunderstandingofthetextanddiscussion.
mainPoints:ToletthestudentsmasterandusefreelysomeoftheusefuleverydayEnglish.
’’’’
/Howaboutwhenweleave?.....
?
’’’’ttouchanything.
DifficultPoints:
ideasbyusingtheimperativesentencestructure.
/unless/as连接的主从句
教学建议
Sincethedialogueandthetextofthisunitareaboutchemistry,theteachermayasksomequestionsaboutchemistryorothersubjectstoleadinthedialogueandthenshowthestudentsthetollsthatareusedinthechemistrylabwhenthetextistaught.
Andalsoinordertomaketheclassverylivelyandinterestingtheteachermayborrowthetubeswhicharefilledwiththreekindsofliquidsfromthechemistrylabandaskthemtoguesswhat’’’’sinthetubesandthenaskthemtowatchtheteachercarefullythendowhattheteacher.
Does,ishclass.
Inordernottocausesomethingdangeroustohappen,theteachermayfillsomewhitevinegar(白醋,somecookingoil,somealcoholinthetubes.
重点词汇讲解
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.
/nottodosth../
allow+doing
Heallowednonoisehere.
Heallowedhisboytospendtheweekendwithhisfriends.
whydidyouallowhertosmokehere?
wedon’’’’tallowdrinkingatschool.
是连词,作“一旦……就……”讲。
onceshearrives,wecanstart.
onceyourealizeit,youwillstudyhard.
onceseen,itcanneverbeforgotten.只要见过一次就难以忘怀。
注意once一般和现在时连用。
是连词,相当于if……not……
Hewillnotcomeunlesshishomeworkisfinished.==Hewillcomeifhishomeworkisfinished.
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:
youwillfailintheexamunlessyoulistentotheteachercarefullyinclass.
wewon’’’’tstartuntilBobcomes.
Hedidn’’’’tfindoutwhathadhappeneduntilhiswifetoldhimaboutit.
’’’’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。
youcangowithmeifyou’’’’dliketo.
youmaystayathomeifyouwantto.
Idon’’’’twanttogothere,buthe’’’’sgoingto.
?
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。
I’‘‘‘?
whataboutplayingfootball?
whatabouttoday’’’’smatch?
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。
makesureyoucomeearlytomorrow.
makesureyourroomisclean.
wemadesureyouwerenotcomingtoday.我们认为你今天一定不来了。
其反义词是“turnon”
turnup其反义词是turndown
/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.
Attheendofthistermwewillhaveafinalexamination.
Hediedintheendthoughthedoctorstriedtheirbest.
Thereisahospitalattheendofthisroad.
表示“具有,带有”
chinaisacountrywithasplendidcultureandalonghistory.
Iliveinahousewithtwowindows.
as为连词,表示方式,意思是“按照、如同”
Statethefactsastheyare.要如实地陈述事实。
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”。
Hedoesn’’’’tspeakasothersdo.
Hehasabignoselikehisfather.像)
Heworksintheschoolasateacherofchinese.(作为)
/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。
Ifyouarebusy,letmegoinsteadofyou.
Theywentthereonfootinsteadofbybus.
ThissummerIwenttoQingdaoinsteadofgoingtoBeijing.
instead是副词。试比较。
Parentsshouldgivetheirchildrenmoreadviceinsteadofmoney.
,heplaysalldaylong.
Thestudentsdidn’’’’,eachofthemmadeaface.
/smell/sound/look/feel等感官动词的用法。其后必须加形容词。
Theflowerssmellverynice.
Theoldwomanlookedveryworried.
Theclothfeelsverysoft.
ThefoodtastessodeliciousthatIcantwaitanylonger.
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。
Noneofthemhas/havegotabike.
Noneofusis/areafraidoftheghosts.
Noneofthismoneyismine.
---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只能指代人,它们不强调数量,可以用来回答who开头的问句。
----Howmanypeoplecanyouseeinthepicture?-----None.
---whoisintheclassroom?----Noone.(没有人)
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。
Enoughhasbeensaidonthissubject.在这一点上说的已经够多的了。
----wouldyoupleasehavesomemore?----No,’’’’vehadenough.
Iamafraidwehaven’’’’tgotenoughtimetodothework.
you’’’’reoldenoughtolearntodressyourself.
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