Being written in haste, the composition is full of mistakes. 这篇文章因为仓促写成，因此错误百出。
疑问：
1. 说这句话时候，the composition写完了吗？
2. 怎么样从时间和动作方面讲解being written?
请老师们指点。谢谢。
Being written in haste, the composition is full of mistakes.
write为动态动词，所以being written in haste这个状语可能产生歧义：
1 being written为目前分词被动语态，表示进行体意义，等于
The composition isbeing written in haste, and it is full of mistakes.
2 being written为系表结构，written表示作文处于仓促写完后的状况，等于
The composition is written in haste, and it is full of mistakes.
系表结构being可以并一般省略，当动态动词的过去分词作表语时，则更应省略，以防止与目前分词被动语态形式相同，产生歧义。所以第二义时，一般省略being, 得到：
Written in haste, the composition is full of mistakes.