Dear John，

　　Yesterday I had read a notice on the Internet．You wanted to look for a Chinese friend online who can actual help you learn the Chinese language，cultures or customs．

　　I'm looking forward to be your friend on the Internet but I wonder whether or not you would like to accept me．If I become our friend on the Internet，I'll try my best to help you for Chinese in my spare time．At∧same time，I'll introduce some cultures and custom of China to you step by step．

　　So if you are interesting in this，please let me know your QQ number and I really expect what we can make good friends soon．

　　Love，

　　Li Hua．

　　详

　　1．去掉had 考查动词时态．根据句中时间状语yesterday，用一般过去时态．

　　2．actual改为actually 考查副词．help是动词，要用副词修饰，形容词actual的副词是actually．

　　3．or改为and考查连词．language，cultures，customs三者之间是并列关系而非选择关系，用连词and．

　　4．be改为being考查动名词．to是介词，后接动词时用动名词形式．

　　5．our改为your考查代词．根据句意：如果我成为你的网上朋友．用代词your．

　　6．for改为with考查介词．help…with…意为"帮助（某人）做…"，是固定搭配．

　　7．加the 考查冠词．atthesametime意为"同时"，是固定搭配．

　　8．custom改为customs 考查名词．custom意为"风俗；习惯"，是可数名词，其前有some修饰时，用复数形式．

　　9．interesting改为interested考查过去分词．beinterestedin意为"对…感兴趣"，是固定搭配．

　　10．what改为that考查连词．动词expect后的宾语从句we can make good friends soon是完整的，用连接词that．