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上一篇写到too…to与so…that的用法，这篇介绍too…to与not…enough to的用法。由too…to的句型改写成not…eno-ugh to时，要把其所用的形容词改为其相反意思的形容词如：
  1.She is too poor to buy a radio
  她很穷，买不起一部收音机
  She is not rich enough to buy a
  radio，她没有足够的钱买一部收音机。
  2. He is too young to join the army
  他年纪太轻不能参军。（即不够参军的年龄）
  He is not old enough to join thearmy，他不够年龄参军。
  not …enough.to的句型也可以由so …that句型所替换，但也要变换其形容词如：
  The box is not light enough for usto lift，这个箱子很重，我们抬不起。
  The box is so heavy that we can'tlift it，这个箱子这样重，致使我们无法抬起。
  可见too …to. so …that和not… …enough to这三个句型有时可以互相替换、表达一个相近的意思，但要注意其用法。如：
  His father was too poor to send hisson to school.
  他父亲过去太穷了，以致无法送自己儿子上学。
  His father was sopoor that he cooldn't send his son to school.
  他父亲过去如此穷以致他不能送自己儿子上学。
  His father was not rich enough tosend his son to school.
  他父亲过去没有足够的钱送自己的儿子上学
  EX，用too… … to或enough …to 填空：
  1.It's __hot__work
  2.That box is__small__ hold a11these things·石零·