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1、中文：你做完功课了吗?
(误)Have you done homework?
(正)Have you done your homework?(表示做功课用do one"s homework.)
2、中文：那些是我们老师的一些书。
(误)Those are some books of our teacher.
(正)Those are some books of our teacher"s.(应用双重所有格形式。)
3、中文：这是我弟弟约翰的书。[环球网校成人高考频道整理所有格误用]
(误)This is my brother John book.
(正)This is my brother John"s book.(John是brother的同位语，John的书用John"s book.)