enough to和too to的用法及区别

Question

You are never too young to start doing things 变成同一句（用enough)

Answer 1

You are never young enough to start doing things ！
enough多用作副词，作状语，一般在形容词后面。
too多用作形容词，作定语，一般在名词前面。

Answer 2

You are old enough to start doing things.

Answer 3

you are enough old to start doing things