公开课Book6 unit 3 Grammar(it 用法).ppt

HIVisavirus Avirusisaverysmall live thing causesdisease Therearemanydifferent virus forexample thefluvirusortheSARSvirus HIV weak aperson simmunesystem YoucanhaveaHIVinyourbloodfor longtime but eventual HIVwilldamageyourimmunesystem muchthatyourbodycanno long fightdisease ThisstageofillnessiscalledAIDS youdevelopAIDS yourchancesof survive areverysmall weakens viruses a eventually longer survival If that so living 1 isabeautifuldayhereandIamsittingunderthebigtreeattheendofthegarden 2 seemsamazingthatatmyageIamstillfitenoughtocycle20kilometresinanafternoon 3 mybirthdayintwoweekstimeandI llbe82yearsold 4 Yourmothertellsmethatyoustartedsmokingsometimeagoandnowyouarefindingdifficulttogiveup 课文原句填空 It It It s it it Grammar Theuseof it Readandanalyzethefollowingsentences ItisFridaytoday ItwasverycoldlastMonday Itisabout2 30now Itisabout35kmfromNankangtoGanzhou ItliesinthesouthofShaoguancity Itis40 C Yougotahighfever Question Whatdoes it inthesesentencesreferto Conclusion it可以用作非人称代词 表示 等 Date weather time distance place Temperature 日期 天气 时间 距离 地点 温度 Readandanalyzethefollowingsentences 1 Whatisthis Itisacellphone 2 Whatisthat Itishisdictionary 3 Whosebookisthis ItisMrCheng s 4 WhereisyourEnglishbook Itishere 5 Thebabycriedbecauseitwashungry Question Whatdoes it inthesesentencesreferto Drawaconclusion it 词性 可以用作人称代词 代指 还可以替代指示代词 或 还可以指代 代词 前文提到的事物 that this 婴幼儿或小孩 IboughtadictionarythreeyearsagoandIamstillusing now 2 IboughtadictionarythreeyearsagobutIamgoingtobuyanew soon It用以指特定的前面提到过的事物 即 it和它替换的是同一个事物 it前无修饰语 而one用于替换与前提事物有共同之处但并不完全一样的事物 one之前或之后常有修饰语来加以区别 注意 It和one的用法区别 it one Readandanalyzethefollowingsentences 1 Itisobviousthatthewaterwastoblame 2 It sapitythatyoudidn tpasstheexam 3 ItissaidthathewillleaveforBeijingtomorrow 分析 it是 句子真正的主语是 形式主语 that引导的主语从句 Itis adj that从句 此种情况常用于以下结构中 It sapity ashame afact anhonor awonder etc that Itisimportant necessary strange natural clear possible etc that Itissaid expected reported believed hoped announced known suggested etc that Practice Itis adj that从句 据报道他已经来到了北京 姚明篮球比易建联打得好是肯定的 ItisreportedthathehascometoBeijing ItiscertainthatYaomingplaysbasketballbetterthanYijianlian Readandanalyzethefollowingsentences 1 Itisnoteasytostopsmoking 2 Itwasdifficulttoquit 在1与2中 it是 真正主语是 3 Itisnogoodcryingoverspiltmilk 4 Inmyoion it snousetryingagain 在3与4中 it是 真正主语是 构成如下结构 形式主语 不定式短语 动名词短语 形式主语 Itis nouse nogood notanygood notanyuse doingsth Summary it做形式主语 It可以在句中充当形式主语 真正主语可以由 引导的主语从句充当 还可以由 以及 短语充当 that 不定式 动名词 Readandanalyzethefollowingsentences Wethinkitourdutytocleanourclassroomeveryday Ibelieveitimportantkeepingnotes Hefounditdifficultthathewouldfinishthetaskinanhour 总结 1 it作 真正宾语有三种形式 形式宾语 不定式短语 动名词短语 that引导的宾语从句 think believe find make consider feel 2 常用的6个动词 注意1 动词 it that when if 常用动词有 enjoy like love dislike appreciate hate don tmind befondof feellike seeto dependon等 宾语从句紧跟it之后 Ihateitwhenpeoplespeakwiththeirmouthsfull 我讨厌有人满嘴的食物 还在说个不停 Pleaseseetoitthatallthedoorsareshut 务必关好门 如果你能给我帮忙 我将不胜感激 Iappreciateitifyoucouldgivemeahand 注意2 动词 it tosb that 常用句型有 oweittosb that 把 归功于 leaveittosb that 把 留给某人去做takeitforgrantedthat把 想当然keepitinmindthat 把 记在心里 Weoweittoyouthattherewasn taseriousaccident 多亏了你才没有发生严重事故 Hetookitforgrantedthathisgirlfriendwouldcomebackagain 他想当然的认为女朋友会再回来 Summary it作形式主语和形式宾语 牢记以下几个句型结构 1 Itis adj for ofsb todosth 2 Itissaid reported believed known hoped that从句3 Ithappens seems appears that从句4 Ittakessb todosth 做某事花了多长时间 5 Itisnogood nouse uselessdoingsth 6 Itisnowonderthat 难怪 7 think believe make find consider feel it adj n todo doing that从句 Onemidnight wasrainingheavily Marywaslyinginbed Shecouldn tfallsleep Suddenly sheheardsomeoneknockingatthedoor Whois Sheasked Shelookedattheclockhungonthewall wasstrikingtwo isme Onemananswered wasimpossibleforhimtoappearhere shethought John Is you Yeah isme themananswered it it It It It It that Fillintheblanks Practice Continuethestory Sherushedtoopenthedoor Johnwasjuststandinginfrontofher HesaidtoMaryexcitedly Imissedtheplane wassaidthattheplane Iwouldtakecrasheddownthreehoursago ItwasinthatplaneIshouldhavegonetoNewYork Afterthis IthinkclearlythatIloveyousomuchIwanttobemarryyou It that which that it that it that there what which isknowntous theearthrunsaroundthesun 2 isnoneedtotakeabusthereb