急!谁可以举例将too…to改写为enough句型,将两个句子合并为含有名词性从句的复合句.急,谢谢

1.too...to...----He is too careful not to have noticed it.
2.改为enough ----He is enough careful to noticed it.
3.He is enough careful that he is too careful not to have noticed it.
呵呵，可能第3句有点问题，因为实在不太明白两个相同意思的句子还要合并成一句，是同时要有enough & too...to...的意思吗？