直译是
Do you need help?
May I help you?
Do you need my help?
Is there any thing I can do for you?
What can I do for you?
Do you need a hand?
有什么需要我帮忙的，尽管说，英语是：Feel free to ask me anytime you need help.
句子解释：
feel free 英[fi:l fri:] 美[fil fri]
[词典] 感到自由，无拘束; <非正>随自己之意（做某事）;
[例句]If you have any questions at all, please feel free to ask me.
如果有任何问题，请随意提问。