ちゃう

auxiliary verb, godan verb (-u)

do completely; finish doing

Expresses completion or thoroughness, often with a sense of finality or regret. Contraction of てしまう/でしまう.

• 宿しゅく題だいを全ぜん部ぶやっちゃった。

  I finished all my homework.

• ケーキを一人ひとりで食たべちゃった。

  I ate the whole cake by myself.

auxiliary verb, godan verb (-u)

do accidentally; happen to do

Expresses an unintended or regrettable action. Often used when something happens by mistake or against one's will.

• 電でん車しゃに傘かさを忘わすれちゃった。

  I accidentally left my umbrella on the train.

• 秘ひ密みつを言いっちゃった。

  I blurted out the secret.