高考英语语法复习课件-IT的用法及强调句

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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/thatcalledonProfessorWangathisofficethismorni

2、ng.ItwasProfessorWangwhom/that/whowecalledonathisofficethismorning.WecalledonProfessorWanginhisofficethismorning.inhisofficethismorningItwasinhisofficethatwecalledonProfessorWangthismorning.ItwasthismorningthatwecalledonProfessorWanginhisoffice.1.Itisonthisarablelandthatt

3、hefarmersproducefoodforthewholepopulationofChina.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:ItistenyearsMissGree

4、nreturnedtoCanada.A.thatB.whenC.sinceD.asPracticeRewritethesesentences,emphasisingtheunderlinedparts.EXAMPLE:ThefarmersproducethefoodforthewholepopulationofChinaonthisarableland.ItisonthisarablelandthatthefarmersproducethefoodforthewholepopulationofChinaThechildrenoftenhe

5、lptheirparentsdothefarmwork.Itisthechildrenwhooftenhelptheirparentsdothefarmwork.2.In1993,atomatowasdevelopedthatwasverydifferentfromanygrownbefore.Itwasin1993thatatomatowasdevelopedthatwasverydifferentfromanygrownbefore.3.ThebiggestproblemofChinafarmersistheshortageofara

6、bleland.ItistheshortageofarablelandthatisthebiggestproblemforChinesefarmers.4.Theplantsgrowningreenhousesareprotectedfromthewind,rainandinsects.Itistheplantsgrowninthegreenhousesthatareprotectedfromthewind,,rainandinsects.5.Futureagricultureshoulddependonhightechnologyasw

7、ellastraditionalmethods.ItishightechnologyaswellastraditionalmethodsthatfutureagricultureshoulddependonItwasHenrywhogaveGeorgeanewtieforhisbirthdaylastyear.ItwastoGeorgethatHenrygaveanewtieforhisbirthdaylastyear.ItwasanewtiethatHenrygaveGeorgeforhisbirthdaylastyear.Itwasl

8、astyearthatHenrygaveGeorgeanewtieforhisbirthdaylastyear.2.Itwasduringthatperiodoftimethattheymak