1.for a rainy day 為著有朝一日困難時未雨綢繆
例句：I have some money staked out for a rainy day.
我存了點錢，以備不時之需。
2.for a time (或 while) —會兒，一段時間
例句：Then, for a time, while I was living with Dr. Scott and attending lectures at the University College, I lost touch with the widow.
此后有一段時期，我住在司各特博士家里，在倫敦大學學院聽課，和這位寡婦就斷了直接的聯系。
3.for all the world 不管怎樣，無論如何
例句：I will chase my dream for all the world.
不管怎樣，我都會追求自己的夢想。
4.for better or worse 不管是好是歹，不論是福是禍
例句：Simple ideas are dangerous because they can change the world, for better or worse.
簡單的觀點是危險的因為這可以改變世界，變好或者變差。
5.for fear of 生怕，以免
例句：And parents around the country walk along their young children for fear of their safety.
這個國家的父母都圍在孩子的身邊，因為擔心他們的安全問題。
6.for free 免費地，無償地
例句：We will do the installation for free. Because we appreciate your business.
我們會免費替你安裝，因為我們很感謝你的生意。