(談及可能發生或不發生的事時說)
used to say sth about an event that may or may not happen
If and when we ever meet again I hope he remembers what I did for him.倘若我們再次見面,我希望他還記得我為他做的事。
釋義來自《牛津高階英漢雙解詞典》第 9 版