Unit 9 It smells delicious --it.ppt

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1、Unit9ItsmellsdeliciousIt用法Whoisit?Itisme.这里的“it”是什么意思呢？Itwasstolen.Theypromisemetofindit.Itisapity.这里的“it”是什么意思呢？It用法一.作指示代词二.作形式主语或形式宾语三.用于强调句一，作指示代词1）it可作指示代词代替上文提到的事物或情况。1.Mypenismissing,Ican’tfinditanywhere.2.Tomhasfailedintheexam.Haveyouheardaboutit?※it用法和which引导的非限制性定语从句

2、用法的区别。Hefailedintheexam，anditworriedhim.Hefailedintheexam.Itworriedhim.Hefailedintheexam，whichworriedhim.2)当说话者不清楚说话对象的性别时,可用it来表示。It’salovelybaby.Isitaboyoragirl？Goandseewhoitis.It’sme.Openthedoor,please3)It指天气、时间、距离、自然现象、环境等。Itissunnytoday.Itisfiveo’clock.Itistwentymilestothe

3、zoo.Itisveryquiethere.Itisspringnow.二.作形式主语或形式宾语it作形式主语或形式宾语,代替不定式、动名词、主语从句或宾语从句。Itisinterestingtolistentothepopularmusic.Itisnouselearningatheorywithoutpractice.Itisnotyetknownwhereshehasgone.Ifinditveryeasytosurftheinternet.Ithinkitmydutytoservethepeople.Ithinkitnecessarythat

4、studentsshouldmasteraforeignlanguageatschool.Itisinterestingtolistentothepopularmusic.Itisnouselearningatheorywithoutpractice.Itisnotyetknownwhereshehasgone.Ifinditveryeasytosurftheinternet.Ithinkitmydutytoservethepeople.Ithinkitnecessarythatstudentsshouldmasteraforeignlanguage

5、atschool.我们觉得改掉坏习惯很难。Wefounditveryhardtogetridofthebadhabit.It’sveryhardtogetridofthebadhabit.在公共场所大声讲话是不礼貌的。Itisimpolitetotalkloudlyinpublicplaces.吃太多朱古力没什么好处。Itisnotgoodeatingtoomuchchocolate.It+is/was+强调部分+that/who(whom)+其他主语，宾语，表语或状语强调的部分是人，that可以由who/whom换用。it用于强调句部分一.陈述句的

6、强调句型结构:Forexample：1.Tomateaneggathomethismorning.强调主语：ItwasTomthat/whoateaneggathomethismorning.强调宾语：ItwasaneggthatTomateathomethismorning.强调时间状语：ItwasthismorningthatTomateaneggathome.强调地点状语：ItwasathomethatTomateaneggthismorning.Tomateaneggathomethismorning.Conclusion:陈述句的强调句型结

7、构:Itis/was+被强调成分(主语/宾语/状语等)+that/who+句子的其他成分。（it在这种句型中本身无实际意义）Notice：1.除谓语动词以外的成分都可用于强调句中;2.如原句时态为现在时或将来时，则be用is,如原句时态为过去时,则be用was;3.当被强调部分指人时，既可以用that,也可用who.二.一般疑问句的强调句型：1.ItwasTomthat/whoateaneggathomethismorning.→WasitTomthat/whoateaneggathomethismorning?2.Itwasathomethat/w

8、hoTomateaneggthismorning.→WasitathomethatTomateaneggth