就是用來(lái)修飾英語(yǔ)名詞的詞語(yǔ)或者句子,比如漂亮的女孩,beautiful girl中的beautiful就是一個(gè)形容詞做定語(yǔ),但是英語(yǔ)中還有后置定語(yǔ)定語(yǔ)從句的用法,比如我寫的信,the letter written by me這個(gè) written by me就是一個(gè)分詞短語(yǔ)作后置定語(yǔ),再比如你回答的問(wèn)題,the question that is answered by you,這個(gè)that is answered by you就是一個(gè)定語(yǔ)從句,是一個(gè)句子修飾名詞.