239. 他是我父亲的朋友。
[误] He is a friend of my father.
[正] He is a friend of my father\'s.
注:名词前面的属格,可代定冠词用,如 my brother\'s wife=the wife of my brother. 又 my brother\'s friends=(all) the friends of my brother. 如果不是指某一个特定的人或几个人时,则须用不定冠词 (a),那是不能用属格来代替的,即是用了属格,还得有不定冠词,但我们又不能说 my brother\'s a friend. 或 a my brother\'s friend,所以只好说 a friend of my brother\'s. 这种表现法所含有的意味是 a friend (that is) my brother\'s 或 one of my brother\'s friends. 这便是英语的双重属格的由来。