1 at any time; no matter when 任何时候；不论何时: You can borrow my car whenever you want. 你任何时候都可以借用我的车。Don't worry. You can give it back the next time you see me, or whenever. 别担心，你可以下一次见到我再还给我，或者其他什么时候都可以。

2 (used when you are showing that you are surprised or impatient) when （用于惊讶或不耐烦时）究竟什么时候: Whenever did you find time to do all that cooking? 你到底什么时候有空把饭菜做好了？