Unit7SectionAGrammarfocus-4c课件人教版九年级英语全册

Unit7Teenagersshouldbeallowedtochoosetheirownclothes.SectionA(GrammarFocus~4c)FreetalkWhatcanyoudoatschool?Whatcan’tyoudoatschool?Doyouagreeordisagree?社区；社团避免接近；远离机会；可能性自己做决定教育；教导完成（困难的事）；应付（困难局面）社会Lookattheserules,use“Ithink…”,“Idon’tthink…”,“Iagree/disagree”and“should/shouldn’tbeallowedto”toexpressyourownideas.RulesforTeenagers1.Don’tsmoke!2.Don’tdrive!3.Getearspierced!4.Haveapart-timejob!Idon’tthinksixteen-year-oldsshouldbeallowedtodrive.Iagree.Theyaren’tseriousenough.Doyouthinkteenagersshouldbeencouragedtomaketheirowndecisions?No,Idon’tagreewiththis.Teenagersaretooyoungtomaketheirowndecisions.Teenagersshouldnotbeallowedtohavepart-timejobs.Idisagree.Theycanlearnalotfromworking.Doyouthinkwemaybeallowedtotakesomephotosifwedon’tuseaflash?Ifyoudon’tuseaflash,thenitmaybeOK.ReadthefollowingsentencesandfindoutthePassiveVoice.GrammarFocus情态动词can/couldmay/mightwill/wouldshall/shouldmustoughtto1.情态动词无时态和人称的变化；2.情态动词后加动词原形Doyouthinkteenagersshouldbeencouragedtomaketheirowndecisions?No,Idon’tagreewiththis.Teenagersaretooyoungtomaketheirowndecisions.Readandobservethecoloredwordsandsentences.Teenagersshouldnotbeallowedtohavepart-timejobs.Doyouthinkwemaybeallowedtotakephotosifwedon’tuseaflash?Idisagree.Theycanlearnalotfromworking.Ifyoudon’tuseaflash,thenitmaybeOK.Idon’tthinksixteen-year-oldsshouldbeallowedtodrive.Iagree.Theyaren’tseriousenough.usedtoexpressouropinions带有情态动词的被动语态结构：情态动词+be+V-ed情态动词canmaymustshould可以也许必须应该含有情态动词被动语态的结构情态动词+be+过去分词Hecleanshisbedroomeveryday.Hisbedroomiscleanedbyhimeveryday.动作执行者谓语动词动作承受者其他成分其他成分动作执行者动作承受者谓语动词主动语态被动语态主动语态转换为被动语态1.

将含有情态动词的主动语态变为被动语态的方法：1)

将主动语态的宾语变成被动语态的主语；2)

将“情态动词

+

动词原形”变成“情态动词

+be+

及物动词的过去分词”。2.

含有情态动词的被动语态的句式结构：1)

肯定式：主语

+

情态动词

+be+

及物动词的过去分词

+

其他

2)

否定式：主语

+

情态动词

+not+be+

及物动词的过去分词

+

其他3)

疑问式：情态动词

+

主语

+be+

及物动词的过去分词

+

其他？主语+情态动词+not+be+done+其他内容.易错点一：表达否定时，“not”接在情态动词后。Paperandwater

wastedbypeople.A.willbenotB.willnotbeC.shouldbenotD.shouldnotbe2.In2050,2G

usedintheworld.A.willbenotB.willnotbeC.shouldbenotD.shouldnotbe易错点二：情态动词+

主语+be+done+其他内容?疑问句中，情态动词后紧跟主语。判断下列句子是否正确？正确（T）错误（F）Shouldclassroombecleanedbystudents?Mustbemyroomcleanedbymyselfnow?Shouldbefoodwastedbypeople?Canthehomeworkbefinishedtomorrow?Canbemoonseenatnight?TFFTF妙指津含有情态动词的主动句变被动句时，谓语动词部分改为“情态动词+be+及物动词的过去分词”。e.g.WecanwritelettersinEnglish.改为被动语态LetterscanbewritteninEnglishbyus.—Thetrafficistoobusy.Wehavetodriveslowly.—Ithinkmorenewroads________inourcity.A．shouldbebuiltB．shouldbuilt

C．havebuilt

D．build可用语法判断法解答本题。主语roads与动词build构成被动关系，所以应用被动语态。从句为含有情态动词的被动语态。故选A项。

典例点拨含有情态动词的被动语态A1．DoyouthinkwemustkeepteenagersawayfromtheInternet?

你认为我们必须让青少年远离网络吗？keep...awayfrom意为“避免接近；使……

远离”

。e.g.Weadviseparentsnottoleavetheirchildrenathomealoneinordertokeep

themawayfromdanger.为了让孩子们远离危险，我们建议父母不要把他们独自留在家。拓展keepawayfrom意为“不接近；远离”

。e.g.Junkfoodtastesdelicious,butitisn’thealthy.Soweshouldkeepawayfromit.垃圾食品吃起来可口，但不健康。所以我们应该远离它。2．

Parentsshouldgiveteenagerschancestomaketheirowndecisions.父母应该给青少年自己做决定的机会。(1)chance（asuitabletimeorsituationwhenyouhavetheopportunitytodosth.）可数名词，意为“机会；机遇”，其后可接todosth.或of（doing）sth.。若表示“做某事对某人来说是一次机会”，其后可接forsb.todosth.。e.g.Inevermissachancetoplayfootball.我从不错过踢足球的机会。Wouldthisbeachanceformetoachievemylifelongdream?这会是成为我实现一生梦想的机会吗？(2)makeone’sowndecision意为“自己做决定”，相当于makeadecisionforoneself。e.g.Ijustwanttobeabletomakemyowndecision.我只想能够自己做决定。1.Youmustcleanyourbedroomeveryday.

Yourbedroom

mustbecleanedeveryday.2.Iwilldo

thehouseworkintheafternoon.

Thehouseworkwillbedoneintheafternoon.4a.Rewritethesentencesaccordingtotheexample.YourbedroomwillbeencouragedLucy’shomeworkbedonebyhertomorrowinsteadawayfromtheInternetmustbekeptchancestomaketheirowndecisionsshouldbegiven社区保持

keep-kept-kept给

give-gave-givenFillintheblankswiththecorrectformsofthewordsinbrackets.Shouldteenagers__________(ask)tomoveoutwhentheystartworking?InmanyWesterncountries,teenagers_____________(allow)tomoveoutateighteen.Theirparentsbelievethattheyshouldbeeducatedtotakecareofthemselvesfromayoungage.Thisway,whenthey_________(start)workingtheycanmanagetheirownlives.

beasked

areallowed

start

continue

move

takev.完成（困难的事）；应付（困难局面）4bYouandyourfriendarestartinganEnglishclub.Makealistofrulesaboutwhatshouldandshouldnotbeallowed.A:Membersshouldbeallowedtousedictionaries.B:Yes,buttheyshouldonlyuseEnglish-Englishdictionaries.英语中表示同意和不同意的表达Sure.Certainly.Ofcourse.Allright.Iagree(withyou).Noproblem.Youareright.That’sagoodidea.Yes,Ithinkso.Ofcoursenot.Idon’tagree(withyou).Idisagree(withyou).Idon’tthink…I’mafraidnot.Noway!Exercise1.Theyoungtreesmustbeplantednow.(改成否定句)Theyoungtrees__________________now.2.Nobodycananswerthequestion.(改成同义句)Thequestion___________________byanybody.3.Weshouldcleanourclassroomeveryday.(改成被动语态)Ourclassroomshould___________everyday4.Canthekids_______afterwellbythenurse?(同上）

mustn’tbeplantedcan’tbeansweredbe

cleanedbelookedCanthenurseslookafter

thekidswell?

一.单选C

1.Weshouldmanage___________ourhouse.A.do B.did C.todo D.doing2.Duringthewintervacation,hewasn’tallowed__________TVeveryday.A.watching B.towatch C.watches D.watch3.Teenagersare_________young_________maketheirowndecisions.A.so;that B.too;to C.such;thatD.so;toB

B

二.

用所给词的