高考英语语法复习课件-IT的用法及强调句.ppt

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1、.carefulperson.Theuseof"It"2005.12.11SummaryTheuseof“it”foremphasis可被强调的部分除谓语之外的句子各成分。基本句子结构Itis/was＋被强调部分＋that/who/whom+句子的遗留部分备注it既可强调现在的情况，也可强调过去的情况。WecalledonProfessorWanginhisofficethismorning.weProfessorWangEg:Itwaswewho/thatcalledonProfessorWangathisofficethismorning.ItwasProfessorWangw

2、hom/that/whowecalledonathisofficethismorning.WecalledonProfessorWanginhisofficethismorning.inhisofficethismorningItwasinhisofficethatwecalledonProfessorWangthismorning.ItwasthismorningthatwecalledonProfessorWanginhisoffice.1.ItisonthisarablelandthatthefarmersproducefoodforthewholepopulationofC

3、hina.2.Itwasfromtheearly1990sthatscientistsstartedtodevelopnewtechniquestoincreaseagriculturalproductionwithoutharmingtheenvironment.怎样判断强调句?---若是强调句，去掉'Itbe…that’还应是一个完整的句子。若不是强调句,去掉'Itis…that'已不是一个完整的句子。Eg:ItistenyearsMissGreenreturnedtoCanada.A.thatB.whenC.sinceD.asPracticeRewritethesesente

4、nces,emphasisingtheunderlinedparts.EXAMPLE:ThefarmersproducethefoodforthewholepopulationofChinaonthisarableland.ItisonthisarablelandthatthefarmersproducethefoodforthewholepopulationofChinaThechildrenoftenhelptheirparentsdothefarmwork.Itisthechildrenwhooftenhelptheirparentsdothefarmwork.2.In199

5、3,atomatowasdevelopedthatwasverydifferentfromanygrownbefore.Itwasin1993thatatomatowasdevelopedthatwasverydifferentfromanygrownbefore.3.ThebiggestproblemofChinafarmersistheshortageofarableland.ItistheshortageofarablelandthatisthebiggestproblemforChinesefarmers.4.Theplantsgrowningreenhousesarepr

6、otectedfromthewind,rainandinsects.Itistheplantsgrowninthegreenhousesthatareprotectedfromthewind,,rainandinsects.5.Futureagricultureshoulddependonhightechnologyaswellastraditionalmethods.ItishightechnologyaswellastraditionalmethodsthatfutureagricultureshoulddependonItwasHenrywhogaveGeorgeanewti

7、eforhisbirthdaylastyear.ItwasGeorgethatHenrygaveanewtieforhisbirthdaylastyear.ItwasanewtiethatHenrygaveGeorgeforhisbirthdaylastyear.ItwaslastyearthatHenrygaveGeorgeanewtieforhisbirthdaylastyear.2.Itwasduringthatperiodoftimethattheymaket