相互代词(reciprocal pronoun)就是表示相互关系的代词。相互代词有each other 和one another两种形式。在当代英语中,each other和one another没有什么区别。相互代词可在句中作宾语,定语。作定语用时,相互代词用所有格形式。
例句:
We should learn from each other / one another. (作宾语)
Do you often write to each other / one another? (作宾语)
We often borrow each other's / one another's books. (作定语)
The students corrected each other's / one another's mistakes in their homework. (作定语)

关系代词