UsefulstructuresTheuseof“it”3.用以表示时间、距离、天气、气候、季节、环境等4.作引导词，在句中作形式主语或形式宾语，代替后面的短语或从句。3)Insteadof“clause”Itdoesn’tmatterwhetherhewillcomeornot.Ithinkitnecessarythatwewillattendthemeeting.5.用于强调句型中1)Hedidn’tcomebecausehewasill.Itwasnot_____shetookoffherdarkglasses____Irealizedshewasafamousfilmstar.(92)A.when,thatB.until,whenC.until,thatD.when,then2)Itwasnotuntil____that____topreparehislessons.(91)A.didhisfathercomein,theboybeganB.didhisfathercomein,didtheboybeginC.hisfathercamein,didtheboybeginD.hisfathercamein,theboybegan特殊句式：ItisreportedthatChinahaslaunchedanotherman-madesatellite.Itisorderedthatthesoldiersshouldcrosstheriveratonce.Itseemsthathehaslearntofthenews.IthappenedthatItooknomoneywithme.Itmattersverymuch/makesgreatdifferenceswhethertogoornot.6)Itsurprisedmethathefailedtopasstheexam.7)ItwasnotlongbeforehereturnedtoBeijing.8)Howlongwillitbebeforehecomesback?9)Itwillbelongbeforehecomesback.10)ItisfiveyearssincehejoinedtheParty.Exercises:1.Ihate______whenpeopletalkwiththeirmouthsfull.itB.thatC.theseD.them2.Inwhichplayis______yourbrotherwillappear?thatwhereB.thiswhenC.itthatD.itwhere3.______theharderyouwork,thebetterresultyou’llget.It’sbelievedthatB.WhatwebelievedthatC.It’sfactD.Whatthefactis4.Nothingcanstopus,_______?A.can’titB.canitC.can’tweD.canwe8.---Haveyouwrittenalettertoher?---No,butI’mgoingtowrite_____tonight.A.itB.thatC.thoseD.one9._______nowprettylate,wetookcandlesandwentupstairs.BeingB.ForC.ForbeingD.Itbeing10.Ourfoodandservicearebetterthan_____usedtobe.A.ItB.weC.theyD.them12.Theteachertoldthestudents_______.A.whytolearnEnglishimportantB.whywasitimportanttolearnEnglishC.whyitimportanttolearnEnglishD.whyitwasimportanttolearnEnglish13.TheTVsetsmadeinChinaaremuchbetterthan______inJapan.thatB.thoseC.themD.it14.---I’mlookingforaflat.---Wouldyoulike_______with_____garden?A.it;theB.it;aC.one;aD.one;the15._______fouryearssinceIjoinedtheArmy.A.ItwasB.ItisC.ThereisD.Therewas1.我是在街上遇见她的父亲的。(强调在街上)2.你是8点开始工作的吗？（强调时间）