大学英语四级考试教程文件.ppt

文档介绍：(would,could,might)+do与过去事实相反过去完成时haddoneShould(would)+have++不定式(were+todo)+动词原形Should/would+:)在有特殊形容词的句套里Itisnecessarythat…Itisimperativethat…Itisessentialthat…Itisimportantthat…Itisstrangethat…Itisnaturalthat…Itisdesirablethat…Itisincrediblethat…Itisadvisablethat…,proposal,order,request,plan,idea,mendation,,believe,think,suspect动词在否定或疑问形式重。例如:,would(that),’drather(wouldrather,hadrather)asif例如:(that)…