高考英语形式主语it的主要句型教学课件高三英语课件

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句型1.•It(so)happened(chanced)that+clause.=sb.happened/chancedtodosth.=sb.didsth.by•chance•当我到那儿时,碰巧他不在IthappenedthathewasoutwhenIgotthere.=HehappenedtobeoutwhenIgotthere.=ItchancedthathewasoutwhenIgotthere.=HewasoutbychancewhenIgotthere.句型2.•done(还有动词appear等可这样使用)Itseemsthatsb.do/bedoing/havedone/haddone=Sb.seemstodo/bedoing/havedone/tobedone/tohavebeen•如:他好象以前去过北京ItseemedthathehadbeentoBeijingbefore.=HeseemedtohavebeentoBeijingbefore.句型3.•Itis/was+被强调的部分+that(who)+剩余的部分.如:•1.直到他回来我才睡觉。(一定要注意被强调句型中的谓语动词否定的转移)•2.只因为他有病了今天没有来上学。Itwasn'tuntilhecamebackthatIwenttobed.Itwasbecausehewasillthathedidn'tcometoschooltoday.(只能用because而不能用for,as或since)•3.我确实是个学生。ItisIwhoamastudent.(句中am不能用are来代替。)句型4.•Itishightime(time/abouttime)+(that)主语+shoulddo/did+其它。(从句中的谓语动词用的是虚拟语气。)如:•我们该回家了。Itishightime(that)weshouldgo/wenthome.句型5.•Itis/wassaid(reported…)+that+从句.如:•据说他读过这篇小说.Itwassaidthathehadreadthisnovel.=Hewassaidtohavereadthisnovel.句型6.•Itisimpossible/necessary/strange…thatclause.(从句中的谓语用should+do/shouldhavedone,其形式是虚拟语气。)如:•真奇怪,他这次考试没有及格。Itisstrangethatheshouldhavefailedinthisexam.句型7.•Itis+apity/ashame…thatclause.(注意从句中的谓语动词用shoulddo或shouldhavedone的形式,但should可以省略。)如:他直到电影结束才回来。他没有看到这部电影真可惜。Hedidn'tcomebackuntilthefilmended.Itwasapitythatheshouldhavemissedthisfilm.句型8.•Itissuggested/ordered/commanded/…that+clause.(从句的谓语动词用shoulddo,但should可以省略。)如:•有人建议推迟会议。Itissuggestedthatthemeetingshouldbeputoff.句型9.•Itis/was+表示地点的名词+where+从句。(注意本句不是强调句型,而是以where引导的定语从句。)如:•ItwasthishousewhereIwasborn.请比较:ItwasinthishousethatIwasborn(后一句是强调句型。)句型10.•Itis/was+表示时间的名词+when+从句。(注意本句型也不是强调句型,而是以when引导的定语从句。)如:•Itwas1999whenhecamebackfrom•theUnitedStates.请比较:Itwasin1999thathecamebackfrom•theUnitedStates.句型11.•Itiswell-knownthat+从句。如:众所周知,她是个知识渊博的妇女。Itiswell-knownthatsheisalearnedwoman句型12.•Itis+段时间+since+主语+did.请比较:Itwas+段时间+since+主语+haddone.如:•他已经离开这儿五年了•注意下列句型的翻译Itisfiveyearssincehelivedhere.Itisfiveyearssincehe______here.Itwasfiveyearssincehe________here.lefthadleft他从这儿搬走已经有五年了句型13.•It+谓语+段时间+before+主语+谓语.(before引导的是时间状语从句。)如:•1.三个小时之后他才能回来。•2.没有多久那个国家的人民就起义了。Itwillbethreehoursbeforehe_______backcomesItwasn'tlongbeforethepeopleinthatcountryroseup.句型14.•Itis+形容词(possible,impossible,necessary等)+for+sb.+todo.如:•我明天之前完成此工作是不可能的。Itisimpossibleformetofinishthisworkbeforetomorrow.句型15.•Itis+(心理品质方面的)形容词+of+sb.+todo.=主语+be+形容词+todo.(常用的形容词有:kind,stupid;foolish,good,wise等。)如:•你真好给我提供了帮助。Itiskindofyoutohelpme.=Youarekindtohelpme.Now,it’stimeformetorelax!ThankyouandGoodbye!

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