っては replaced with っちゃ？


My friend said:

> うたっちゃだめだから。

Is the っちゃ a colloquial replacement for っては in this case?




Precisely.

In meaning,

「ては」＝「ちゃ」, 「ちゃあ」.

Thus,

> 「うたっちゃだめだから。」

means:

> "You shouldn't sing (it/this song/here/now, etc)."




Precisely.

In meaning,

「ては」＝「ちゃ」, 「ちゃあ」.

Thus,

> 「うたっちゃだめだから。」

means:

> "You shouldn't sing (it/this song/here/now, etc)."

