each other前的介词该怎样确定

这个就太多了,
They are different from each other.他们都不一样
They are talking with each other.他们在聊天
We write to each other regularly.我们彼此经常通信.
They esteemed each other and made allowances for each other.他们互敬互谅.
We're through with each other.我们关系完了.
They co-operate fully with each other.他们相互间通力合作.
其实你只要知道each other 可以作介词宾语就可以了,至于用什么介词,就看你要表达什么意思,英语中这么多介词,归纳不过来的.
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