How can I do for you that you can believe me I love you forever!

How can I do for you that you can believe me I love you forever! How can I help you?与What can I do for you?的区别 Can I do for you? Could you please tell me what can i do for you or how to help you （ ）can i do for you?A,what B,how C,where Who can tell me how can I do for myself? what can i do for you? what can i do for you? what can i do for you? What can I do for you? what can I do for you? 翻译anything I can do for you? what can I do for you?翻译.. What can i do for you? where can i do for you? what can i do for you ,sir so,what can i do for you? what can i do for you?