before

ago, before

before, in front of, in the front of

副词 before:

1. earlier in time; previously
   同义词：earlier
2. at or in the front
   同义词：ahead, in front

1. B comes before C in the alphabet.
   B在字母表里排在C之前。
2. It will be a long time before we finish this dictionary.
   我们需要很长的时间才能把这部词典编译完。
3. He made a statement before the House of Commons.
   他在下议院当众发表了一个声明。
4. He will die before he submits.
   他宁死不屈。
5. He always put the interests of others before his own.
   他总把他人的利益放在第一位。
6. I have seen that film before.
   那部电影我以前看过。

be.fore

adv.（副词）
Earlier in time:
在此之前：早些时候：
例句：
They called me the day before.
前一天他们给我打了电话

In front; ahead.
在…前面；在前头
prep.Abbr. bef.（介词）缩写 bef.
Previous to in time; earlier than.
…之前：在…时间之前；早于…
In front of.
在…前面
In store for; awaiting:
即将发生的；等待着的：
例句：
A young person`s whole life lies before him.
年轻人的生命展现在他前面

Into or in the presence of:
进入，在…面前：
例句：
She asked that the visitor be brought before her.
她要求把访问者带到她的面前来

Under the consideration or jurisdiction of:
在考虑中，在审理中：
例句：
The case is now before the court.
这个案子现在已交庭审理

In a position superior to:
地位高于：
例句：
The prince is before his brother in the line of succession.
在王位继承权上，这个王子优于他兄弟

conj.（连接词）
In advance of the time when:
在…时间之前：
例句：
See me before you leave.
在你离开之前来见我

Rather than; sooner than:
宁可…也不愿；与其…宁可：
例句：
I will die before I will betray my country.
我宁可死也不会背叛我的国家

来源：
Middle English bifore
中古英语 bifore
from Old English beforan * see per
源自 古英语 beforan *参见 per