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1、sothattooto和enoughtoso that, tooto和enough to的互相转换 sothat, tooto和enough to都是初中英语教材中的重要结构，在一定条件下它们可以相互转换，并经常成为中考考查的热点之一。先请看下面两道中考试题： 1. He is old enough to go to school. He is _ _ that _ _ go to school. 2. She was so weak that she couldnt take care of her baby. She was _ weak _ take care of her baby.
2、那么在什么情况下三者可以相互转换呢？ 一、sothat与tooto的转换 当that引导的从句为否定式且从句主语与主句的主语相同时，sothat可转换为tooto结构；若从句主语与主句的主语不相同时，sothat可转换为toofor sb to结构。例如： She is so young that she cant go to school. She is too young to go to school. The box is so heavy that he cant carry it. The box is too heavy for him to carry 二、sothat与eno
3、ugh to的转换 1. 当that引导的从句为肯定式时，若从句主语与主句主语相同时，sothat可转换为enough to结构；若从句主语与主句主语不相同时，sothat可转换为enough for sb to结构。例如： Xiao Lin is so old that he can go to school. Xiao Lin is old enough to go to school. The box is so light that he can carry it. The box is light enough for him to carry. 2. 当that引导的从句为否定式时
4、，若从句主语与主句主语相同时，sothat可转换为enough to的否定结构；若从句主语与主句主语不相同时，sothat可转换为enough for sb to的否定结构。同时要注意，转换后的形容词要用其相应的反义词。例如： The man is so old that he cant go to work. The man isnt young enough to go to work. The desk is so heavy that I cant move it. The desk isnt light enough for me to move. 三、enough to的句式为否定
5、式时，enough to可以转换为tooto结构。 转换后的tooto结构中的形容词要用其相应的反义词。例如： He is not old enough to do the work. He is too young to do the work. The problem is too difficult for me to work out. The problem isnt easy enough for me to work out. 改写同义句，每空一词。 1. The book is interesting enough for everybody to read. The book is _ interesting _ everybody likes to read it. 2. The boy is so short that he cant reach the buttons of the lift. The boy is _ short _ _ the buttons of the lift. The boy isnt _ _ _ _ the buttons of the lift.
