| 词组 | once adverb |
| 释义 | Contents overview once : adverbat onceat once 54210178one day and onceone day and once and once 54211258542 once: adverbWhen once means 'at some time', we use it for the past but not for the future. To refer to an indefinite future time, we can use sometime or one day. Compare:–I met her once in Venezuela.Once upon a time there was a beautiful princess.–Come up and see me sometime. (not Come up and see me once.)We must go walking one day. (not We must go walking once.)When once has the more precise meaning of 'one time (not twice or three times)', it can be used to talk about any time, including the future.I'm only going to say this once.Note that at once means 'immediately'.'Can I have the bill?''At once, sir.'Previous Next |
| 随便看 |
|
英语用法大全包含1354条英语用法指南，基本涵盖了全部常用英文词汇及语法点的翻译及用法，是英语学习的有利工具。