You don't have to ask for my permission. 你不需要得到我的允许。

　　Why didn't you just ask me for the money? 你为什么没有向我借钱？

　　She didn't really ask for you, she asked for me. 她找的其实不是你，而是我。

　　I need to ask for some help here.  我得找个人来帮帮忙了。

　　You name it. What can I do for you? 说说看，我能不能帮到你？