The conjunctive adverb 便
The conjunctive adverb 便 
emphasizes how fast an event happened.
It is used in written language.
便 can be placed either between verbs or between parts of a compound sentence.
In a compound sentence, 便 is preceded by a subject.
emphasizes how fast an event happened.
It is used in written language.
便 can be placed either between verbs or between parts of a compound sentence.
In a compound sentence, 便 is preceded by a subject.Scheme
action 1
便
action 2
Examples
音乐会结束，人群便散去了
The crowd dispersed as soon as the concert ended
yīnyuèhuì jiéshù, rénqún biàn sàn qù le
吃了午饭便走了
He left just after lunch
chī le wǔfàn biàn zǒu le
她的呼吸变得均匀，便睡着了
Her breathing became steady and she fell asleep
tā de hūxī biàn de jūnyún, biàn shuìzháo le
便 is often used as part of the structure 一…便… .
It indicates that the second action happens just after the first one.
In this case, if a sentence has one subject, it can be placed either before “一” or before 便.
If the sentence has two subjects, the first subject is placed before “一” and the second subject is placed before 便.
.
It indicates that the second action happens just after the first one.
In this case, if a sentence has one subject, it can be placed either before “一” or before 便.
If the sentence has two subjects, the first subject is placed before “一” and the second subject is placed before 便.Examples
他一下课便回家了
He went home after class
tā yí xiàkè biàn huí jiā le
枪声一响，人群便逃散了
The crowd dispersed as soon as the shots rang out
qiāng shēng yí xiǎng, rénqún biàn táosàn le
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