英语中,修饰、限定名词、代词的句子成分叫定语.定语如果短,常由单个字构成的,放在名词前；如果长,由多个词或句子构成,就放在被修饰词之后,这就叫后置定语,句子做定语叫定语从句.
短、或单个分词作定语,要前置,也就是放在名词前：a sleeping boy; a good-looking man、a broken window; my given name
长的、短语、句子作定语,要后置：A name given by one's parents or grandparents is called a given name.
The man standing by the window is our teacher.
规律：汉语的定语一般放在被修饰词前；英语根据长短,短前长后.