高考英语it的用法、常用句型.pptVIP

*it可以作代词（如人称代词、非人称代词）和引导词，也可以用于强调句式中，还可以用于一些固定表达中。一、it作代词1.用作人称代词，指代：①上文提到过的人、事、物或情况等；②婴儿、性别不明或没必要区分性别的人或动物。此外，it也可指代未知的人。如：Inmyopinion,lifeinthetwenty-firstcenturyismucheasierthanitwasusedto.Someoneisringingthedoorbell.Goandseewhoitis.It’sJohnonthephone.2.用作非人称代词，指时间、天气、距离或自然现象等。如：Itisonlyhalfanhour’swalktothehospital.It’sabouttwokilometersfromheretothestation.Itisrainingheavilyoutside.二、it作引导词1.it作形式主语的常用句型1)“It+be+名词+主语从句”中从句谓语常用“（should+）动词原形”。常用于本句型的主要有apity,ashame,nowonder,noaccident等。如：Itisagreatpitythatheshouldbesogreedy.Itisashamethatheshouldattempttoinjurethereputationofanhonestman.Itwasnoaccidentthatsuchabookshouldappearinthe18thcentury.2)“It+be+形容词+主语从句”中从句谓语常用“（should+）动词原形（或完成时）”。常用于本句型的形容词主要有impossible,strange,surprising等。如：Itisimpossiblethatitshouldbeamerecoincidence.It’sstrangethatsheshouldhavebeenarrestedforstealing.Itwassurprisingthatheshouldhavefinishedwritinganovelinonlytwentydays.3)“It+动词（+宾语或状语）+主语从句”。常用于本句型的动词主要有please,happen等。如：Itpleasedmeverymuchthathesucceeded.Itpleasesmethatheshouldwanttotalkwithme.ItsohappenedthathehadjustleftforTianjin.4)“It+动词的被动语态+主语从句”。常用于本句型的动词主要有accept,admit,allow,announce等。如：It’sacceptedthattheuniverseisendless.Itisgenerallyadmittedthatheisatrustworthyperson.Itwasannouncedthatallprisonerswouldbesetfree.ItwasannouncedthatthePrimeMinisterwouldspeakontelevisionthatevening.2.it作形式宾语1)根据句子结构的需要，人们常用it作形式宾语，而将真正的宾语放在宾语补足语后。常用于这种句型的动词有believe,bring,consider,declare,feel,find,make,prove,think等。如：Ifinditamazingthatanyonewouldwanttolistentothatmusic.Idon’tthinkitpossibletomasteraforeignlanguagewithin3months.Ifounditworthwhilereadingthisbook.2)it作形式宾语的常用句型：a.动词+it+if/when从句当enjoy,like,dislike,love,hate,pr