高中英语选修六Unit04B省公开课金奖全国赛课一等奖微课获奖

LearningaboutlanguageEx.1Possiblemeaningswordwhich1n.ageneraltendencyinthewayasituationischanging2v.tostartdoingsomethingthateveryonecopies1v.tomakesomething(especiallysth.bad)increase2n.asubstancethatcanbeburnedtomakeheartorenergy1n.thephysicalormentalconditionofsomeone2v.toformallysayorwritesomeinformationoranopinion1v.tousetime,energy,goods,etc.2v.(formal)toeatordrinksomething1v.tolookquicklyatsomeoneorsomething2v.toreadsomethingveryquicklytrendfuelstateconsumeglance122121/38Ex.2data,keptonquantities,runoutbuildup,catastrophecomeaboutconsequencephenomenongraphperevenifresultedinLearningaboutlanguageEx.1Itisscientistswhowarnedthatgreenhousegaseswouldwarmtheearthbytrappingheatenergyintheatmosphere.…itistheburningofmoreandmorefossilfuelsthathasresultedinthisincreaseincarbondioxide.Ex.2Itis

scientists

whowarnedthegreenhousegaseswouldwarmtheearthbytrappingheatenergyintheatmosphere.Itis

thegreenhouseeffect

thatgivestheearth’ssurfacetheaveragetemperatureof15℃.Itis

fossilfuels

thatmuchoftheenergyusedtolightandheatourhomescomesfrom.2/38Itis

thedevelopedcountries

thatconsumethemostenergyintheworld.Itis

forcenturies

thatcarbondioxidehasthetendencytostayintheatmosphereonlyforadayorless.Itis

theirveryexistence

thatlow-lyingcountriesfeelisindangerfromrisingsealevels.Itis

environmentalists

whohavetriedtostoptheearth’stemperaturerising.Itis

futureclimatechangesandtheireffectsonourenvironment

thatscientistswanttofindoutabout.Itis

byseveralmeters

thattheleveloftheseacouldriseintheyearsaheadbecauseofglobalwarming.Itis

outerspace

thatmightprovideuswithnewenergysourcesinthefuture.Theuseofit(2)Unit4Grammar3/38在上一单元我们已经讲解了it在句中能够用作许多成份,在本单元我们用图表形式进行整理使同学们对it使用方法有系统掌握。4/38性质功能例句代词用作人称代词，代替上文提到人或事物。—Whoisit?—It’sme.You'vehelpedmealot;I'llneverforgetit.5/38性质功能例句代词用以代替指示代词this或that。—What’sthis?—It’sacomputer.—Whosebookisthat?—It'shers.6/38性质功能例句代词表示时间、天气、距离、价钱等。It’stimeforlunch.It’sraininghard.It’stwomilesfromtheschooltoourhome.7/38引导词作形式主语,代替由不定式、动名词或从句等表示真正主语。Itiseasytobuyanewradio.Itisnousetellinghimthat.Itdoesn'tmatterwhethershecomesornot.

8/38引导词作形式宾语,代替由不定式、动名词或从句等表示真正宾语。Ifeelitmydutytohelphim.Wethoughtitnousedoingthat.I’vemadeitclearthatnobodyisallowedtosmokehere.9/38引导词表示强调,其结构是:Itis/was+强调部分+that+原句剩下部分。此结构只限于强调状语、主语和宾语。注意：①假如强调是人,其后用that或who均可;②假如强调是物、时间或地点等状语,其后只能用that不用where、when、why。10/38引导词IsawTomhereyesterday.①ItwasIthat/whosawTomhereyesterday.②ItwasTomthat/whoIsawhereyesterday.③ItwasyesterdaythatIsawTomhere.④ItwasherethatIsawTomyesterday.11/38引导词注意:若原句是not…until句型,在强调until部分时,要把否定形式放入被强调部分。比如:Hedidn’tleaveuntillreturned.=Itwasn’tuntilIreturnedthatheleft．12/38强调句型若强调谓语,则用do/does/did+动词原形,常译为“确实”“一定”等,该结构只能用于陈说句或祈使句中。引导强调句与其它从句区分在于：Dobepatient!一定要有耐心。HedoeswanttolearnEnglishwell.他确实想学好英语。ItwasintheplacethatIwasborn.(强调句)ItwastheplacewhereIwasborn.(定语从句)13/38易混其它从句①强调句型中前后时态应一致;②被强调部分为主语、宾语和状语,若把itis／was和that／who去掉,剩下词语能重新组成正确句子,而且不缺成份,不然就是其它从句。Itwasin1945thatWorldWarIIended.(强调句)Itwas1945whenWorldWarIIended.(状语从句)③ItisalongtimesinceImetyoulast.(时间状语)Itistimethatyouwenttobed.(定语从句)14/38我们用图表形式对it用法进行归纳,相信同学们已经对it使用方法有了更清楚认识。接下来我们对it在强调句中使用方法做一小结。15/38用在强调句型中,为了强调句子某一成份(通常是主语、宾语或状语),惯用结构:

Itis/was＋被强调部分＋that

(who)…ImetTominthestreetyesterday．16/38①ItwasIwho(that)metTominthestreetyesterday.②ItwasTomthatImetinthestreetyesterday.③ItwasinthestreetthatImetTomyesterday.④ItwasyesterdaythatImetTominthestreet.主语宾语时间状语地点状语17/381.Peterlentusthemoney.2.Theywantmoney.3.AllthishappenedonMonday.ItwasPeterwholentusthemoney.Itismoneythattheywant.ItwasonMondaythatallthishappened.依据划线部分把以下句子变成强调句。18/384.Ididn’thearfromheruntillast

summer.5.WhydoeseveryonethinkIamnarrow-minded?ItwasnotuntillastsummerthatIheardfromher.WhyisitthateveryonethinksIamnarrow-minded?19/38口诀：

代词it本意它,既可指这又指那;

时间天气均可指,谈到距离也用它;

假主假宾均可作,强调句型跟that。it在句子中能够作如此多成份,那么我们怎样区分it在句中不一样成份呢?20/381.Itistwoyears__Ijoinedthearmy.A.beforeB.sinceC.thatD.after2.Itwastwoyears___Ijoinedthearmy.A.beforeB.sinceC.thatD.afterPractice21/383.Itwasnotuntil1920____regularradiobroadcastbegan.A.whileB.whichC.thatD.since4.___isafactthatEnglishisbeingacceptedasaninternationallanguage.A.ThereB.ThisC.ThatD.It22/385.Itwasabout600yearsago___thefirstclockwithafaceandanhourhandwasmade.A.thatB.untilC.beforeD.when6.Ihate____whenpeopletalkwiththeirmouthsfull.A.itB.thatC.theseD.them23/387.TheParkersboughtanewhousebut_____willneedalotofworkbeforetheycanmovein.A.theyB.itC.oneD.which8.____noneedforustodiscusstheproblemagainsinceithasalreadybeensettled.A.IthasB.TherehasC.ItisD.Thereis24/389.____wasin1979___Igraduatedfromtheuniversity.A.That;thatB.It;thatC.That;whenD.It;when10.Whatapitymynewcomputerdoesn’twork!____mustbesomethingwrongwithit.A.ItB.ThereC.ThisD.That25/3811.Ilike____intheautumnwhentheweatherisclearandbright.A.thisB.thatC.itD.one12.Someoneisknockingatthedoor,butwhocan___be?A.oneB.heC.sheD.it26/3813.Aknockonthedoormadehimlookup.But___wasonlythemanager.A.thisB.thatC.sheD.it14.Someoneisringingthedoorbell.Goandsee____.A.whoisheB.whoheisC.whoisitD.whoitis27/3815.Is___necessarytocompletethedesignbeforeNationalDay?A.thisB.thatC.itD.he16.Does___matterifhecan’tfinishthejobontime?A.thisB.thatC.heD.it28/3817.___worriedherabitthatherhairwasturninggrey.A.ThatB.ItC.WhatD.This18.Theyhavemade__arule__intheroom.A.this;nottosmokeB.it;smokingC.it;tonotsmokeD.it;nottosmoke29/38Itwasbecauseofbadweather__________thefootballmatchhadtobeputoff.(上海春)A.soB.sothatC.whyD.that高考链接30/382.Itwaswithgreatjoy________hereceivedthenewsthathislostdaughterhadbeenfound.

（福建）A.becauseB.whichC.sinceD.that31/383.Itwasaftertheinventionofprinting________topublishlargenumbersofbooksandpictures.

（上海春）A.werepeopleableB.thatpeoplewereableC.whenwerepeopleableD.peoplewereable32/384.Itwasafterhegotwhathehaddesired_____herealizeditwasnotsoimportant.（辽宁）A.thatB.whenC.sinceD.as33/385.Itisimagination______makestheworldcolorful,fullofvigorandvitality.(上海春)A.where B.what C.that D.when34/386.Itisnotwhoisrightbutwhatisright______isofimportance.(重庆卷)A.which B.it C.that D.this35/381.It’sdifficultto