help each other with homework 为什么介词用with 而不用on 之类的?

They always help each other with study. shall we help with each other 改写 chat with each other和help each other为什么一个有with ,一个没有? 1）Help with each other是英式用法还是美式用法?2）是help each other 还是help with each other Shall we help with each other的同义句 shall we help with each other同义句 help each other help each other 什么help each other help each other还是help with each other.help each other还是help with each other呀?有点迷糊 原题We should _____ each other and _____ each other.A.help; learn B.help; learn from C.help with; learn D.help with; learn from. They like help each other .help each other 提问 help each other do和 help each other to do We should help each other help each other的翻译 help each other.的中文. help each other怎么读 help each other的意思 help each other with homework 为什么介词用with 而不用on 之类的?