人教版英语选修6第四单元grammar课件.ppt

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1、Unit4GlobalWarming强调句型‘it’foremphasis强调句型，你掌握了吗？Explanation由it引导的强调句结构：Itis(was)+被强调部分+that/who(主语是人)/whom(宾语是人)+句子其他部分注意：此结构强调的成分仅限于主语，宾语和状语。如：原句：Myfatherdidtheexperimentinthelabyesterdayevening．强调主语：Itwasmyfatherwho/thatdidtheexperimentinthelabyesterda

2、yevening．原句：Myfatherdidtheexperimentinthelabyesterdayevening．强调宾语：Itwastheexperimentthatmyfatherdidinthelabyesterdayevening．强调时间状语：Itwasyesterdayeveningthatmyfatherdidtheexperimentinthelab．原句：Myfatherdidtheexperimentinthelabyesterdayevening．强调地点：Itwasint

3、helabthatmyfatherdidtheexperimentyesterdayevening．原句：Myfatherdidtheexperimentinthelabyesterdayevening．强调地点：Itwasinthelabthatmyfatherdidtheexperimentyesterdayevening．Is/Was+it+所强调的部分+that/who+句子其他部分?问句结构：强调句型的一般疑原句：你是8点开始工作的吗？Didyoubegintostartat8o'clock?

4、强调句型：Wasitateighto’clockthatyoubegantowork?也就是说，强调句型疑问句原句就是一般疑问句。问句结构：强调句型的特殊疑特殊疑问词+is/was+it+that+句子其他部分?原句：他为什么不能回答这个问题？Whycouldhenotanswerthequestion?强调句型：Whywasitthathecouldn'tanswerthequestion?注意：强调句型的特殊疑问句就是对特殊疑问词的强调,但that后的句式要用陈述句。判断是否是强调句的方法：可把It

5、is/was…that去掉，剩余部分在不增减任何词的情况下还是一个完整的句子，那么这种句子是强调句。Itwasbecauseshewasillthattheydidn’taskhertodothejob.→Becauseshewasill,theydidn’taskhertodothejob.ItwasinthestreetthatImetherfather.→InthestreetImetherfather.realize变成过去式，而原句中的didn't去掉。二、not...until...的强调形

6、式:Itisnotuntil+被强调部分+that...“直到……才”主要用于强调时间状语的强调句型。原句：Ididn'trealizeshewasafamousfilmstaruntilshetookoffherdarkglasses.→ItwasnotuntilshetookoffherdarkglassesthatIrealizedshewasafamousfilmstar.每空填一词,使该句与所给句子的意思相同。1.Wedependonenergytodomanythings._____ener

7、gy____wedependontodomanythings.2.Hedidn’tgotoschoolbecausehewasill.______becausehewasill______hedidn’tgotoschool.ItisthatItwasthat3.Myfatherdidn’treturnuntil11o’clocklastnight.______________11o’clock______myfatherreturnedlastnight.4.Davidboughtawalkmanfr

8、omastoreyesterday.______David_________boughtawalkmanfromastoreyesterday.ItwasnotuntilthatItwasthat/who5.Themountainclimberwasrescuedwiththehelpofthelocalpeople.______withthehelpofthelocalpeople______themountainclimberwasre