单词：once
音标：[wʌns] ；
柯林斯词典等级：5 级；
牛津三千核心词汇；
adv. 一次, 曾经, 一旦
conj. 一旦, 一经
n. 一次
a. 从前的
conj. 一旦, 一经
n. 一次
a. 从前的
r. on one occasion
r. as soon as
r. at a previous time;
r. as soon as
r. at a previous time;
考试类型：[中考/高考/IELTS]
词性分布：
once的用法和样例：
例句
用作副词(adv.)
- Once or twice she looked over her shoulder at me.有一两次她回头看看我。
- She had not once spoken to him all the evening.整整一晚上,她都没有跟他讲过一次话。
- I see them about once a fortnight.我大约两星期见他们一次。
- Once we lived in London.我们曾经住在伦敦。
常见句型
用作副词(adv.)
- I have been there once.我到过那儿一次。
- I once went around the world.过去我周游过全球。
用作连词(conj.)
- Once you begin, you must continue.一旦开了头,你就必须继续下去。
- Once you have taken the examination, you'll be able to relax.你一旦考过试,就可以轻松一下了。
- Once you have promised you must do it.你既已答应,就应该去做。
- Once inside her bedroom, she began to cry.一走进卧室,她就哭了。
用作名词(n.)
- Once is enough for me.我一次就够了。
- She's only done it the once so don't be too angry.她只做过这一次,所以不要太生气。
常用短语
用作副词(adv.)
once again- 一而再,再来一次now again, as in the past
- 一次了结地,一劳永逸地for the last time
- 有时,偶尔sometimes, but not often
- 再一次now again as before
- 几次several times; a few times
- 从前some time ago; formerly
用作名词(n.)
all at once- 同时at the same time
- 立刻immediately
词汇搭配
- once in a blue moon罕见的，极少的，难得...
- at once立刻
- once or twice一两次
- all at once同时
- once and for all彻底地
- once upon a time从前
- once bitten, twice shy一朝被蛇咬,十年怕井...
- once more再一次
- once again再一次
- once too often又一次
- once in a while偶尔
- once and away一次了解地
- not once一次也不
- more than once不止一次(好几次)...
- once and again一而再
- gone过去的
- for once就这一次
- every once in a while间或
- once in a way有时(偶而
- for this once就这一次
经典引文
Miss Trant read it through once.sssss S. Bedford
出自：ssssJ. B. Priestley
【近义词】
- adv.
- at one time