重要

once

/wʌns/📚 300 5雅思中考高考

If something happens once, it happens one time only. ^一次

I met Miquela once, briefly.
我见过蜜凯拉一次，时间很短。

The water is fine once you're in!
一旦你进入里面，水就很好喝了！

He only did it the once.
他只这么做过一次。

once 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）: Lesson 32 Shopping made easy once 副词: 曾经，以前; Lesson 099&100 Ow!; Lesson 105&106 Full of mistakes; Lesson 6 Percy Buttons; Lesson 19 Sold out; Lesson 28 No parking

单词造句:

网友用“Once”造句精选: Since that evening I haven't once slept through the night. 自那晚之后，我再也没睡过一次囫囵觉。; "Have they been to visit you yet?"—"Just the once, yeah." “他们已经去看过你了吗？”— “来过，就那一次。”; Lung cells die and are replaced about once a week. 肺细胞约每周死亡、更新一次。; Her parents once ran a shop. 她父母从前开过一家商店。; I lived there once myself, before I got married. 我从前自己住在那儿，没结婚前。; I once went camping at Lake Michigan with a friend. 我曾和一个朋友去密执安湖野营。; We once walked across the frozen pond at two in the morning. 我们曾在凌晨2点徒步横穿冰冻的池塘。; The decision had taken about 10 seconds once he'd read a market research study. 他读完一份市场调研报告后，10秒钟就做出了决定。

关联词one/wʌn/pron. 任何人；一个人

近义词twice/twaɪs/adv. 两倍；两次

词组	含义	例句
at once	立刻，现在，马上：表示需要立即采取行动或完成某事；	Tell the doctor to come at once. She is having a baby.^{告诉医生立刻过来。她正在生孩子。}
at once	同时，同时进行	Can you pat your head and rub your belly at once? He tried to eat four cookies at once.^{你能同时拍头和搓肚子吗？他试图一次吃四块饼干。}