1、基本意思：
too+形容词/副词+to do 太….以致不能
so.......that+从句 如此....以至于
enough+名词+to do. 有足够的.做某事
形容词/副词+ enough+to do. 足够.做某事
如：
（1) I was too excited to say a word我激动得一个字也说不出来。
（2) Tom is too short to reach the apple Tom太矮了，拿不到那个苹果。
（3）there is enough room to hold these people to have a meeting有足够的地方容下这些人开会。
（4) The boy is strong enough to carry the heavy box这个男孩ルカ气够大，能搬动这只箱子
（5）The boy is so strong that he can carry the heavy box
2、句型转换
too.....to句型，这是一个否定句型，不能在不定式前加not。可以用so..that.结构改写也可以用enough否定句型加反义词表述同意思
*too…to与 so…that sb. can’t…的句型转换：前者为简单句，主语只有一个，而后者为复合句，主语有两个，试比较：
（1）The man was too angry to be able to speak.
=The man was so angry that he wasn’t able to speak.
（2） I was too excited to say a word我激动得一个字也说不出来。
=I was so excited that I couldn ’t say a word
*too…to…与 not enough to句型的转换：
（1）He is too young to get married.
=He is not old enough to get married.
（2）The book is too difficult for me to read.
=The book is not easy enough for me to read.
三个句型转换：
如：
(1)I am too fat to sit我太胖以至于不能坐
=I am not thin enough to sit
=I am so fat that I can’t sit
(2)I am too young to go to school
=I am not old enough to go to school
=I am so young that I can’t go to school
(3)Tom is too short to reach the apple Tom太矮了，拿不到那个苹果。
= Tom is not tall enough to reach the apple
=Tom is so short that he can’t reach the apple
