高中英语语法之it形式主语

高中英语语法之it形式主语

Theuseof"it"第一节形式主语 It作形式主语替代that从句1）Itis+adj.+that从句2）Itis+v-ed+that从句3）Itisapity(ashame...)that...4）Ithappens(seems，looks，appears)that...5）Itistime(abouttime，hightime)that...Itisthefirst(second...)timethat... 1）Itis+adj.+that从句①Itisclear(obvious，true，possiblecertain....)that.....②.Itisimportant(necessary，right，strange，natural...)that...从句中要用虚拟语气（should+v.原形）1.ItisimportantthatstudentstodaymasterEnglish.2.Itisperfectthatyoucancometomybirhtdayparty.3.Itisobviousthatweneedmorepractice.4.Itisstrangethathe(should)havemadeamistake.5.Itisnaturalthathefallinlovewithsuchabeautifulgirl.6.It"sstrangethathefeelsoangry. 2）Itis+v-ed+that从句ItissaidthatAndyLauwillcometoGuangzhoutomorrow.Itwasreportedthattherewere300peoplediedofthisdisease.ItisknownthatChangjiangRiveristhesecondlongestriverintheworld.ItwassuggestedthatthesportsmeetbeputoffuntilnextSaturday.Itisdesiredthatwe(should)geteverythingreadybytonight.Itwasorderedthatthemedicinebesenttherebyplane. 3）Itisapity(ashame,nowonder,better)that....Itisapitythatwedidn"tgraspthatopportunity.Itwasagreatpitythatyou(should)havemadesomanymistakesinyourmathexercise.Itwillbebetterthatshestaywithhergrandmother. Ithappens(seems，looks，appears)that...Ithappened(sohappened)thathemethisteacherinthestreet.Ithappenedthatherparentswerebothout.Ithappenedthattheharvestwasbadthatyear.IthappenedthatIhaddriventhatkindofcarbefore.IthappenedthatIwasstandingnexttohimwhenhecollapsed.Itseemsthatsheisverysad. it用作形式主语,指代从句1)Itis+adj.+that从句①Itisclear(obvious，true，possiblecertain....)that.....②.Itisimportant(necessary，right，strange，natural...)that...从句中要用虚拟语气（should+v.原形）2)Itis+v-ed+that从句①Itissaid(reported，learned....)that...②.Itissuggested(ordered/demanded/insisted/commanded...)that(should+v.原形)3)Itisapity(ashame...)that...that后的从句一般用虚拟语气（should+动词原形）4)Ithappens(seems，looks，appears)that...5).①Itistime(abouttime，hightime)that...虚拟语气②Itisthefirst(second...)timethat(完成时) 1.真可惜，他没来。itisapitythat2.我们爱自己的父母是很自然的。itisnaturalthat3.很明显，他是是个勤奋又上进的人。itisobviousthat4.我恰巧在书店里碰到他。ithappenedthat5.人人都建议他提前预习考试的内容，但是他不听，难怪他不及格。itwassuggestednowonderthat6.掌握好英语和计算机技术对于现代人来说是很重要的。itisveryimportantthat7.好像他过几天就会回来。itseemsthat8.真遗憾，这样的事竟然发生在你的班上。itisapitythat9.大家都知道，要学好英语一定要多读多听多做练习。itiswellknownthat10.那是我第一次到北京。itwasthefirsttimethat11.该是我们行动起来保护环境的时候了。itishightime Goodbye