In the lab英語教案

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教學目標

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連接的主從句

教學建議

Sincethedialogueandthetextofthisunitareaboutchemistry,theteachermayasksomequestionsaboutchemistryorothersubjectstoleadinthedialogueandthenshowthestudentsthetollsthatareusedinthechemistrylabwhenthetextistaught.

Andalsoinordertomaketheclassverylivelyandinterestingtheteachermayborrowthetubeswhicharefilledwiththreekindsofliquidsfromthechemistrylabandaskthemtoguesswhat''''sinthetubesandthenaskthemtowatchtheteachercarefullythendowhattheteacher.

Does,whichisthecontentofthetext.InthiscasethestudentsmayfeelverynewandtheymaybeinterestedinEnglishclass.

Inordernottocausesomethingdangeroustohappen,theteachermayfillsomewhitevinegar（白醋,somecookingoil(香油),somealcohol(白酒)inthetubes.

重點詞匯講解

1.firstofallmeansfirst.意為首先，第一

Firstofall,IwanttosayI''''mveryhappytobeherewithYou.

Firstofall,wemustmakeadecision.

相關的詞組：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是連詞，作“一旦……就……”講。

(1)Onceshearrives,wecanstart.

(2)Onceyourealizeit,youwillstudyhard.

(3)Onceseen,itcanneverbeforgotten.只要見過一次就難以忘懷。

注意once一般和現在時連用。

4.unless是連詞，相當于if……not……

(1)Hewillnotcomeunlesshishomeworkisfinished.==Hewillcomeifhishomeworkisfinished.

(2)Youwillbeintroubleunlessyoufollowmyinstruction.==Youwillnotintroubleifyoufollowmyinstruction.

unless和not…until的區別

unless引導從句時多強調條件，而not……until句型則強調時間。Unless連接的主從句的時態一般是主句是將來時而從句現在時。not……until連接的主從句中可以使用多種時態。

比較：

(1)Youwillfailintheexamunlessyoulistentotheteachercarefullyinclass.

(2)Wewon''''tstartuntilBobcomes.

(3)Hedidn''''tfindoutwhathadhappeneduntilhiswifetoldhimaboutit.

5.Don''''ttouchanythingunlessyourteachertellsyoutodo.

在此句末的to后省略了touch。在英語里，有些動詞像hope,like,want,try,need,助動詞如beableto.,begoingto之后，為了避免前后重復，往往只用一個to代表動詞不定式。

(1)Youcangowithmeifyou''''dliketo.

(2)Youmaystayathomeifyouwantto.

(3)Idon''''twanttogothere,buthe''''sgoingto.

6.Whataboutwhenweleave?

Whatabout……?與Howabout……?可以用來詢問消息、提出建議或征詢意見，其后可接名詞、代詞、動名詞、副詞（如next）和狀語從句等。

(1)I''''mready.Whataboutyou?

(2)Whataboutplayingfootball?

(3)Whatabouttoday''''smatch?

7.makesure后跟了一個省略了that的從句。當表示“弄確實、使確定”意思時，常用在祈使句中，其后的從句里要用一般現在時。當makesure表示“認為、確信”的意思時，其后的從句時態可視情況而定。

(1)Makesure(that)youcomeearlytomorrow.

(2)Makesure(that)yourroomisclean.

(3)Wemadesureyouwerenotcomingtoday.我們認為你今天一定不來了。

8.turnoff其反義詞是“turnon"

turnup(開大)其反義詞是turndown(關小)

9.attheendof/intheend

attheendof意為“在……末，在……盡頭”，既可以表示時間的概念也可以表示空間的概念。而intheend只能表示時間的概念,其后不能接of短語，相當于finally,atlast.

(1)Attheendofthistermwewillhaveafinalexamination.

(2)Hediedintheendthoughthedoctorstriedtheirbest.

(3)Thereisahospitalattheendofthisroad.

10.with表示“具有，帶有”

(1)Chinaisacountrywithasplendidcultureandalonghistory.

(2)Mr.Smithisamanwithtwosons.

(3)Iliveinahousewithtwowindows.

11.YoumustdoeverythingasIdo.

as為連詞，表示方式，意思是“按照、如同”

(1)Statethefactsastheyare.要如實地陳述事實。

(2)Whydidn''''tyoudoasIasked?

like/as的區別

like表示“像、如同”的意思是介詞，其后不能跟從句。而as是連詞，要接一個從句。as當作介詞時表示“作為”。

(1)Hedoesn''''tspeakasothersdo.(如、像)

(2)Hehasabignoselikehisfather.像）

(3)HeworksintheschoolasateacherofChinese.（作為）

12.insteadof/instead

insteadof是介詞短語。意思是“代替、而不是”。其后可以接動名詞、不定式、介詞短語和名詞、代詞。可放在句首或句尾使用。

(1)Ifyouarebusy,letmegoinsteadofyou.

(2)Theywentthereonfootinsteadofbybus.

(3)ThissummerIwenttoQingdaoinsteadofgoingtoBeijing.

instead是副詞。試比較。

(1)Parentsshouldgivetheirchildrenmoreadviceinsteadofmoney.

(2)Heneverstudies.Instead,heplaysalldaylong.

(3)Thestudentsdidn''''tsmile.Instead,eachofthemmadeaface.

13.taste/smell/sound/look/feel等感官動詞的用法。其后必須加形容詞。

(1)Theflowerssmellverynice.

(2)Theoldwomanlookedveryworried.

(3)Theclothfeelsverysoft.

(4)ThefoodtastessodeliciousthatIcantwaitanylonger.

14.Noneofyouwatchedcarefullyenough.

none為不定代詞，意思是“沒有一個人或物”。none做主語指代可數名詞時，其謂語動詞單復數形式都可以，但是當它指代不可數名詞時，其謂語動詞為單數第三人稱形式。none常與表示范圍的of介詞短語連用并表示全部否定。

(1)Noneofthemhas/havegotabike.

(2)Noneofusis/areafraidoftheghosts.

(3)Noneofthismoneyismine.

(4)---Howmanyapplesdoyouhave?---None.

none/noone的比較

none既可以指代人也可以指代物，強調數量，可以用來回答howmany開頭的問句。而用法與意思基本相同的noone(nobody)只能指代人，它們不強調數量，可以用來回答who開頭的問句。

(1)----Howmanypeoplecanyouseeinthepicture?-----None.(一個也沒有)

(2)---Whoisintheclassroom?----Noone.(Nobody)（沒有人）

15.enough的用法

enough+noun./adj./adv+enough

enough可指代可數名詞或不可數名詞，其謂語動詞形式可依據它指代的名詞的數來定。

(1)Enoughhasbeensaidonthissubject.在這一點上說的已經夠多的了。

(2)Enoughweresenttohim.Henolongerwantedtohavesuchbooks.

(3)----Wouldyoupleasehavesomemore?----No,thanks.I''''vehadenough.

(4)Iamafraidwehaven''''tgotenoughtimetodothework.

(5)You''''reoldenoughtolearntodressyourself.