The Vてしまう of standard Japanese, when used to indicate completion, can become Vてまう in Kansai-ben
Common uses:
Grammar elements:
Kansai vs. Standard:
| Standard | Vてしまう | 
|---|---|
| Kansai-ben | Vてまう | 
Formation:
Formation from standard:
| Standard | 行って しまう | 
|---|---|
| Kansai-ben | 行って まう | 
Example:
| Standard | まだ時間あるから、おさら洗ってしまうよ。 | 
|---|---|
| Kansai-ben | まだ時間あるから、おさら洗ってまうわ。 | 
| English | There's still a little time, I'll finish up the dishes. | 

    
Commentary:
Question forms: Vて(し)まえへん and Vて(し)まわん
The question form of Vてまう is Vて(し)まえへん or Vて(し)まわん, with the choice up to the speaker.
Both are pronounced with a rising intonation.