定语：就是起到修饰限定名词代词等作用的成分.一般可以是形容词,名词,形容词性物主代词,动名词,现在分词,过去分词,不定式,介词短语,从句等.
前置定语：就是修饰成分在名词代词等的前面.比如说：形容词,形容词性物主代词,动名词（a reading room ）单个的现在分词和过去分词（falling leaves fallen leaves ）,名词修饰名词也可以（a school boy ）
后置定语：就是修饰成分在名词代词等的后面.
比如说：介词短语,不定式,分词短语,从句等
例子：the way of solving the problem
the way to solve the problem
a boy standing over there
a book written by Luxun
the boy who studies very hard
这是我想到的,