once upon a time 從前
us［E］/pron. （we的賓語形式）我們：We hope he can join us. 我們希望他能夠加入我們。
use［E］/v. （使）用；利用；- /n. ［U］［C］用；使用；利用；用途：The camera does not use film any more. 照相機不再使用膠卷。/May I use your mobile phone? 我可以用你的手機嗎？/Can't you see that he is using us? 你看不出他在利用我們嗎？/There is no use staying on. 繼續待下去沒有用。/More and more things require the use of computers. 越來越多的事情需要使用計算機。/We should make use of his knowledge and experience. 我們應該利用他的知識與經驗。/Robots have many different uses in modern industry. 機器人在現代工業中有許多不同的用途。
used to do 過去常做/be used to doing 習慣於做某事/use up 用完；耗盡/bring into use 交付使用；開始使用/put ... to use 運用/make use of 使用；利用
useful /adj. 有用的：Work makes people feel useful. 工作使人覺得有用。/English-Chinese dictionaries are very useful to you when you study English. 當你學習英語時，英漢詞典對你有用。
usual /adj. 平常的；往常的：Our parents will be worried if we go home later than usual. 如果我們比平常回家晚，我們的父母會擔心。/He asked me some usual questions. 他問了我一些平常問題。/People often do things according to their usual habits. 人們通常按往常的習慣做事。/Heavy traffic is usual at the rush hour. 高峰期交通擁擠很平常。/It is usual to clean the classroom after school. 放學後打掃教室很平常。
as usual 照例；照舊；像往常一樣
usually /adv. 通常：What do you usually have for breakfast? 你早飯通常吃些什麼？/If you are kind to others，they will usually be kind to you. 如果你對別人好，他們通常也會對你好。