before是什么意思？

before
英 [bɪˈfɔ:(r)] 美 [bɪˈfɔr,-ˈfor]
prep.
在…之前;先于，优于;当着…的面;与其…
conj.
在…之前;在…以前;比…早些;与其…
adv.
先前，从前;在前，在前方
Annie was born a few weeks before Christmas
安妮出生在圣诞节前几周。
《柯林斯高阶英汉双解学习词典》
2
He spent his early life in Sri Lanka before moving to England
在移居英格兰之前，他早年是在斯里兰卡度过的。
《柯林斯高阶英汉双解学习词典》
3
The war had ended only a month or so before.
战争大约一个月前才刚刚结束。
《柯林斯高阶英汉双解学习词典》
4
Before Gallacher could catch up with the ball, Nadlovu had beaten him to it.
加拉赫还没来得及追上球，纳德洛武就已经抢先一步触到球了。
《柯林斯高阶英汉双解学习词典》
5
It was some time before the door opened in response to his ring.
他按完门铃后过了一会儿门才打开。

before的用法是什么

before
英 [bɪˈfɔ:(r)] 美 [bɪˈfɔr,-ˈfor]
prep.
在…之前;先于，优于;当着…的面;与其…
conj.
在…之前;在…以前;比…早些;与其…
adv.
先前，从前;在前，在前方

双语例句
Annie was born a few weeks before Christmas
安妮出生在圣诞节前几周。

before意思是之前。

prep.
在…之前;先于，优于;当着…的面;与其…
conj.
在…之前;在…以前;比…早些;与其…
adv.
先前，从前;在前，在前方

after