once
例子
I only ate sushi once in Japan.
我在日本只吃过一次寿司。
The bus comes once an hour.
公交车每小时来一次。
1.1
一次, 哪怕一次
on even one time, if ever
例子
You did n't once thank me!
你一次都没感谢过我！
Did she once consider my feelings?
她曾考虑过我的感受吗？
例子
I once visited that museum when I was a child.
曾经我小时候参观过那个博物馆。
She once lived in New York before moving here.
她曾经住在纽约，然后搬到了这里。
03
一次, 曾经
used to indicate one generation of separation in family trees
例子
My once-removed cousin is my dad's first cousin.
我一次移除的表亲是我父亲的第一个表亲。
She 's my aunt once removed, my grandmother's sister.
她是我的表姑妈，我祖母的妹妹。
once
01
一旦, 一...就...
used to express that something happens at the same time or right after another thing
例子
I 'll call you once I reach the train station.
我一到火车站就会给你打电话。
Once the concert ends, we'll go backstage to meet the band.
一旦音乐会结束，我们将去后台见乐队。
Once
01
一次, 仅此一次
a single occurrence
例子
I'll allow it just this once.
我只允许这一次。
Once is enough, do n't ask again.
一次就够了，别再问了。
