Unit19ModernAgriculture课件
日期：2010-09-09 09:27
scientistsstartedtodevelopnewtechniquestoincreaseagriculturalproductionItis/was+所强调的成分+that/who/whom+其它成分否定：Itis/wasnot+…+that…疑问：Is/Wasit+…+that…特殊疑问：疑问词+is/was+it+that/who/whom…?It的注意点强调主语：ItwasIthat/whometLiMinginthestreetyesterday强调宾语：ItwasLiMingthat/whomImetinthestreetyesterday强调地点状语：ItwasinthestreetthatImetLiMingyesterday强调时间状语：ItwasyesterdaythatImetLiMinginthestreetIsittheboywholooksafterthegarden?=Doestheboylookafterthegarden?ItwasnotuntilIsawherthatIstoodup=Ididn’tstandupuntilIsawherWhatisitthathewantstosee?Whenwasitthatyoucaughtcold?Whyisitthatyouwanttochangeyouridea?注意：1，Unit19ModernAgriculturea:ItisonthisarablelandthatthefarmersproducefoodforthewholepopulationofChinab:ThefarmersproducefoodforthewholepopulationofChinaonthearablelanda:Itisfromtheearly1990sthatscientistsstartedtodevelopnewtechniquestoincreaseagriculturalproductionwithoutharmingtheenvironmentb:Fromtheearly1990s，原句的谓语动词时态是一般过去，
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