1. 一般认为 each other 指两者,other another指三者或三者以上。但在实际运用中,这两个短语常可互换:We respect each other [one another]. 我们互相尊重 (对方)。The sea and the sky seemto melt into one another [each other]. 大海和蓝天似乎融为一体。2. 两者均有所有格:They know each other’s [one another’s] weak points. 他们都彼此了解对方的缺点。3. each other 可折开用 (each…the other),而 one another则不能:We helped each other. =We each helped the other. 我们互相帮助。4. 汉语的“互相”是副词,但是英语中的 each other 和 oneanother均为代词,因此在及物动词之后可直接用作宾语 (如help eachother);而在不及物动词之后,则要借助介词 (如talk to each other, learn from one another 等)。5. 5.这两个短语均不能用作主语:正:We each know what the other thinks. 误:We know what each other [one another] thinks. 正因为不能用作主语,所以用它们作宾语的句子不能改为被动语态。
each other作为相互代次表示两者之间 而one another则至少是三者啊.如we learned skills of encrypting from each other.they passed the stick to one onther