In the lab英语教案.docx
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Inthelab英语教案
Inthelab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.