Unit4BreakingBoundariesGrammar課件-高中英語選擇性

Unit4BreakingBoundaries

Grammar

Itasanemptysubject

WatchandThinkWhatwehavelearntaboutitbefore1.Iboughtanewhouseanditneededtobepaintedanddecorated.(it----anewhouse)2.What’sthatItisanewdevice.(it----that)3.Someonemusthavebeenhere.Butwehavenoideawhoitwas.it----acertainperson4.Thenewcouplegotababyanditwasverylovely.(it---ababy)5.HesmokedinbedandIdon’tlikeit.(it------Hesmkoedinbed)6.Bythattime,thepandanolongerneeded____(it)motherforfood.7.Thecatcanwash_____(it)BBythattime,thepandanolongerneeded____(it)motherforfood.ythattime,thepandanolongerneeded____(it)motherforfood.Bythattime,thepandanolongerneeded____(it)motherforfood.6.Thecatcanwash______.Bythattime,thepandanolongerneeded____(it)motherforfood.6.Thecatcanwash______.What’sthisanewmachine.itsitselfit作為人稱代詞，可以指前面提到的事物，或特定的人或不知性別的嬰兒。也可以指前面提到的片語或整個句子，此時，相當于that。物主代詞和反身代詞為itself8.Itisalovelyday,isn’t9.Itwasnearlymidnightwhenshecameback.10.ItisMarch8,Women’sDay.11.Itissome2,300kilometersfromBeijingtoGuangzhou.12.Itis39degree!Youmayhavegotafever.13.Itis15dollors.14.Itliesatthefootofthemountain.s39degree!Yougotahighfever!it作為無人稱代詞，可以是時間、地點、距離、天氣、氣溫等自然現(xiàn)象。溫馨提示：當我們在表示今天、明天、昨天干什么或是什么，用it作主語，今天、明天、昨天作狀語，如：今天是星期五：ItisFradaytoday.一般不能翻譯成：TodayisFridayWatchandThinkWhatwewilllearnaboutitfromthefollowing1.Butitisvitalnottotakeanychances.2.whenIsawthetragicscenesonthenews,Ifeltitwasmydutyasadoctortogothereandoffermyhelp.3.Ittookthemayeartobuildthebridge.4.Itisawasteoftimedoingsuchuselessthings.5.ItissuggestedthateachstudentsinganEnglishsongattheclassmeeting.6.Itdoesn’tmatterwhetherhecomesornot.以上例句中的it作形式主語，真正主語為不定式（短語）、動名詞（短語）或從句。it常代替由不定式短語、動名詞短語或從句表示的真正主語，作形式主語，而將真正的主語后置it常代替由不定式短語、動名詞短語或從句表示的真正主語，作形式主語，而將真正的主語后置常代替由不定式短語、動名詞短語或從句表示的真正主語，作形式主語，而將真正的主語后置。常代替由不定式短語、動名詞短語或從句表示的真正主語，作形式主語，而it常代替由不定式短語、動名詞短語或從句表示的真正主語，作形式主語，而將真正的主語后置。將真正的主語后置。

it常代替由不定式短語、動名詞短語或從句表示的真正主語，作形式主語，而將真正的主語后置。it作形式主語，所代替的是句子的邏輯主語，并無實際詞義還可以保持句子的結(jié)構(gòu)平衡，避免主語過長，顯得頭重腳輕。it作為形式主語主要分為三種情況。一、代表不定式，根據(jù)句子的謂語又可分為謂語四種類型：1.1）be+形容詞+（for/ofsb.)+不定式egAsfarasi’mconcerned,itisnecssaryforustodealwithstress.Itisreallykindofyoutogivemealifthome.2.be+名詞+不定式(Itis+n.+todosth.)

egItwasherdutytocleantheroom.Itisashameforustohavelostthegame.3.be+介詞短語+不定式

egIt

wasagainstmyprincipletodothat.4.及物動詞+賓語+不定式

Itcost150yuantobuytohbuythedress.Ittookmeayeafinishit.edress.Ittookmeayeartofinishit.二、代表動名詞，一般以“be+名詞”作謂語。It’snouse/good/fun/awasteoftimedoingsth.Itisawasteoftimedoingsuchuselessthings.Itisnousegivinghimsomeconstructiveadvice.做某事沒有用/沒有好處/沒有意思/是浪費時間三、代表從句，具體可分為六種類型：1.It+be+形容詞+從句(Itis+adj.+從句)egItisnaturalthatsheshouldknoweverythingaboutit.2.It+be+名詞+從句(Itis+n.+從句)Itisaquestionhowhedidit.Itisnowwonderthatheisasleep3.It+動詞的被動語態(tài)+從句(known,said,reported,agreed...)egItisnotdecidedwhowilltakeoverthecompany.4.It+be

/其他系動詞(seem,look)+that從句

egItmaybe/seemsthatheviewstheissuefromadifferentperspective.5.It+動詞+that....1)Ithappenedthattherewasadoctoronthespot.2)Ithit/occurredtome/struckmethatIhadn’tfinishedmyhomework.6Itdoesn’tmatterwhether/if…Doesitmatterif/whether...Itdoesn’tmatterifyoumissthebus,becausethere’sanotherone15minuteslater.注意事項：1.Itisimportant/necessary/right/strange/natural/…that…(should)do…Itisanecessarythatyoudoenoughexercisesbeforetherace.2.Itbe+suggested/ordered/advised/commended/required...that(should)+doIsuggestedthatweplayagameofchess.---Who’sthatatthedoor---____isthemilkman.四四、it的其他常見句型1）該是我們回家的時間了。Itistimethatweshouldgo/wenthome.2)我收到你的信兩天了。ItisthreedaysthatIreceivedyourletter.3)這是我第一次參觀長城。It/This/ThatisthefirsttimethatIhavevisitedthegreatWall.4)過兩周我們就要考試了。Itwillbetwoweeksbeforewetakeanexam.5)我三點完成作業(yè)。Itwasthreeo’clcokwhenIfinishedmywork.6)這是我讀過的最好的一本小說了。It/That/ThisisthebestnovelthatIhaveeverread.7)Heiscleverandstudieshard.AndItisthesamewithhisbrother.8)我是在昨天的聚會上認識他的。Itwasattheyesterdaay’spartythatigottoknowhim.__________________________________7)Itisthesamewithsb./sth.Heiscleverandstudieshard.And__________________________（他哥哥也一樣）。1.Itistimethat...did/shoulddo...2.Itis(hasbeen)/was(hadbeen)+段時間名詞+since...did/haddone3.It/This/Thatis/wasthefirst/...timethat...havedone/haddone...4.Itwill(won’t)be/was(not)+段時間名詞+before...do/did...5.Itwas+點時間+when...did...6.It/This/Thatis/was+最高級+that...havedone/haddone...7.已的情況也適合于甲的情況。Itisthesamewith.../Itistrueof.../Soitiswith...

8.強調(diào)句：Itis/was+被強調(diào)部分+who/that+原句剩余部分

做某事沒有用/沒有好處/沒有意思/是浪費時間五、常見therebe句型和it形式主語的辨析：（翻譯下面各句）1.找到你家困難。_____________________________________________2.他很誠實，這沒有任何懷疑。__________________________________3.你沒有必要擔心他的安康。__________________________________4.和他爭辯這個問題沒有意義。___________________________________5.沒有辦法解決這個問題。_______________________________________6.Thereisnodenyingthefact...__________________________________7.Thereisnohurrytodosth.____________________________________8.沒有時間去度假。____________________________________________1.Thereisdifficulty(in)findingyourhouse.2.Thereisnodoubtthatheishonest.3.Thereisnoneedforyoutoworryabouthishealth.4.Thereisnosense/point(in)arguingaboutthematter.5.Thereisnowayofsolving/tosolvetheproblem.6.不否認……7.沒有必要匆忙做……8.Thereisnotimetospendaholiday.單擊此處添加標題

鞏固練習一、單句語法填空1.Fromtheteacher’spatientexplaintion,Ihavelearntwhatabigresponsibility____istoeducate.2.Iknow_____isimportanttoknowmyownlimitations,butwhatisdifficultistohelpotherstoknowtheirownlimitations.3.It_____(know)tousthatheisoneofthemostfamousfootballplayersintheworld.4.Itneveroccurredtome_____youcouldsucceedinpersuadinghimtochangehismind.5.______feltfunnywatchingmyselfonTV.6.Anaverageofjust18.75cmofrainfelllastyear,making____thedriestyearsinceCaliforniabecameastatein1850.7.Bythattime,thepandanolongerneeded____(it)motherforfood.單擊此處添加標題8.Tooursurprise,thedooropenedof______(it).9.____,inthemiddleofthebush,wasalittlebird,singingtothesky.10._____isnowonderthatsuchatopstudentisaddictedtoonlinegames.11.______happenedthattherewasadoctorinthecrowds.12.Youcanneverimaginehowdifficulty_____wasfindingthemissingkidinthemountain.13.Itiscareless____youtomakesomanymistakesintheexam.14._____isnopointingettingupsetaboutit.---Let’sjusttrytofindasolution.15.---Who’sthatatthedoor---____isthemilkman.16._____isthreeyearssincemylittlebrotherjoinedthearmy.17.Itwon’tbelong_____wewillselebratedtheSpringFestival.18.Iwonderwhere_____wasthatyougottoknoweachother.19.Todaywecelebrate._____isexactlyonemonthsincethelastreportedcase.二、用it作主語，改寫下面句子。1.Weallknowthattheyhavebrokentheirpromise.2.Togettomyschoolfrommyhomebybiketakesmehalfanhour.3.Don’tyouthinktryingtogetBettytochangehermindisawasteoftime4.Thatallhumanbeingscanmakeeadifferencetothesocietyismybelief.5.Asisreported,theEnglishsummercampwilloffermanyusefulcoursesavailabletoeveryone.6.Youarecarelesstomakesomanyspellingmistakesinthecomposition.7.S