It-的用法总结

1It的用法总结一.代词:1)指代上文2)指代this/that3)指代未知性别的婴儿或孩子或身份不明的人4）指代时间/地点/天气/温度/距离/环境Whatdoes“it”referto?1.Itgetsdarkveryearlyinthewinter.2.Whatwillyoucallitifit’saboy?3.Ilovespring---It’sawonderfultimeoftheyear.4.It’slessthan100kilometresfromheretoJinan.5.Whenthefactorycloses,itwillmean500peoplelosingtheirjobs.6.What’sthis?It’sacat.7.Ithassnowedmuchthisyear.注意：it,one和that,those作替代词的区别(1)Thebookinyourbagisveryinteresting.CanIborrow?(2)Thebookinyourbagismoreinterestingthan______onthedesk.(3)Theweatherhereismuchcolderthan____inNanjing.(4)Thebooksarefree.Youcantake____freeofcharge.(5)Thebooksinthebagarebetterthan_____onthedesk.it表示特指，与前面指代的名词是同一个one表示泛指，指代单数可数名词，与指代的名词同类但不同一个that表示特指，相当于the+名词单数，与指代的名词同类但不同一个those表示特指,相当于the+复数可数名词,与指代的名词同类但不同一个2it指时间的几个重要句式【句式1】itis/hasbeen+段时间+since----自从----多久了•Itis/hasbeen3yearssinceIvisitedyourcompany.【句式2】Itwas+段时间+before---过了多久-----才---•Itwas3hoursbeforeherealizedthetruth.【句式3】Itwillbe+段时间+before--要过多久----才--•Itwillbe3monthsbeforetheycompletethebridge.【句式4】itwas+点时间+when---某事发生于---某一时刻—Itwas10o’clockwhenthebigfirebrokeout.【句式5】It/thisis/wasthe+序数词+time+现在完成时态/过去完成时-（表示某人第几次做某事）•ItisthesecondtimeIhaveheardofthis.【句式6】Itistime(abouttime/hightime)thatsb.did/shoulddo（该是干……的时候了）Itistimethatwewenttoschool.对比训练1.Itwillbeyears____wemeetagain.2.Itistenyears____Icametothistown.3.Itistenyearsago____Icametothistown.4.Itisthethirdtime___I_________(visit)tothistown.5.Itwas2am.___Tangshanearthquaketookplace.A.whenB.thatC.beforeD.since3二.引导词:1)形式主语2)形式宾语3)强调句It作形式主语基本结构：It+be/v.+……+(forsb/ofsb.)todosth(动词不定式)doingsth.（动名词短语）that/whether…（从句）注意1：:FororOf?1.Itisimportant____ustolearnEnglishwell.2.Itisverykind____youtohelpmelearnEnglish.3.Itisfoolish____youtobelievehim.4.Itisnecessary____youtogooverthislesson.注意2;It何时代替doing?It+be+nousenogood+doingsthawasteoftime……翻译：1.和他争论没有用。_______________________________2.打电脑游戏是浪费时间。_____________________________________________注意3：that后的从句要用虚拟语气（should+动词原形），should可以省(1).Itisapity(ashame/anhonor/agoodthing/afact/asurprise/...)that...(2).Itisimportant(necessary，strange，natural...)that...(3).Itisinsisted(ordered/commanded,suggested/advised/proposed,demanded/requested/required...)that...注意4：Heissaid/reportedtohavegoneabroad.=Itissaid/reportedthathehasgoneabroad.Allthestudentsarebelievedtohavedonetheirbest.=Itisbelievedthatallthestudentshavedonetheirbest.注意5：It+vi.(不及物动词)+thatIthappensthathewasout.碰巧…Itseemsthathedoesn’tknowthesecret.好像…Itappearsthatheishonest.好像…ItoccurredtomethatIlostmypurseonthebus.我突然想到…Itdoesn’tmatterwhetherhewillcomeornot.…没有关系4It作形式宾语基本结构：动词+it+形容词/名词+（for/ofsb+）todo(动词不定式)thinkdoingsth（动名词短语）believethat从句（从句）findnecessaryfeelpossibleconsidernatural,supposenouse/nogood/makeawasteoftimekeep………Ithinkitimportanttomakeasummaryintime.Ifinditagoodhabitthatwemakeasummaryintime.HefeltitnouselearningEnglishwithoutspeakingit.it作形式宾语的特殊句型：V.+it+if/that/when动词有喜欢类：enjoy,like,appreciate,prefer讨厌类：hate,dislikeIwouldappreciateitifyoupaidincash.Ilikeitintheautumnwhentheweatherisclearandbright.Ihateitwhenpeopletalkwiththeirmouthsfull.5It引导强调句1.基本结构：Itis/was+被强调部分+that/who(人)...例如：他是因为病了才没能帮我Itwasbecausehewasillthathecouldn’thelpme.Wasitbecausehewasillthathecouldn’thelpme?Whywasitthathecouldn’thelpme?2.not…until句式的强调句型：Itis/wasnotuntil…+that...“直到…才…”例如：Hedidn’tgethomeuntilitwasdark.，三．用在固定结构中的ittakeiteasy.别紧张takeitforgranted认为···理所应当believeitornot信不信由你makeit成功；完成某事forgetit忘了吧；没关系worthit有好处，值得做It/Thatalldepends.要看实际情况而定whenitcomesto····当谈到…，但提到…gotit=understand理解，明白