It作形式主语的几大基本句型.doc

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1、“It”作形式主语的几大基本句型  2011-06-0722:27:53

2、  分类：语法归纳

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4、字号大中小 订阅 ◇It’s+形容词/名词+that+从句Itisnecessarythatyoutrainyourselfbeforethewalk.Itisimportantthatyouhaveyourownsupportteam.Itwasapitythathelostthegame.It’sapitythatyoumissedtheexcitingfootballmatch. ◇It’s+形容词+(for

5、sb)+todosthItisdifficulttowalkthrougheightcountryparks.Itisusefultohavesupportteams.Itisimportantforhimtofinishitintenhours.Itisnecessaryforpeopletolearnteamspirit.特别提醒：☆该句型的否定结构为It’s+形容词+(forsb)+not+todosthItisveryimportantnottogivethemtoomuchfood.(7B100)Itisve

6、rypolitenottospeakloudlyinpublic. ☆该句型有时可以与Itis+adj.+that从句的句型互换使用，意思不变。如：Itisnecessaryforyoutotrainyourselfbeforethewalk.=Itisnecessarythatyouwilltrainyourselfbeforethewalk. ◇It’s+名词+todosthIt’severyone’sdutytoobeythelaw.Itisnotagoodhabittostayuptoolate.Asastud

7、ent,itisbadmannerstocomelatetoclass.Itismyturntocleantheblackboard. ◇Ittakessb+sometimetodosthIttookustwohourstosetupthestage. ◇Itseemsthat+从句Itseemedthathedidn’ttellthetruth. ◇It’s+过去分词+从句惯用句型有：Itissaidthat(据说),Itisreportedthat(据报道),Itisbelievedthat(大家相信),Itish

8、opedthat(大家希望),Itiswellknownthat(众所周知),Itisthoughtthat(大家认为),Itissuggestedthat(据建议)等。Itisreportedthat16peoplewerekilledintheearthquake.