ちゃった
(Cha ta)
Indicates the completion of an action or expresses regret/unintentionality.
Connection rules
- +Verb (te-form) + しまう
- +Verb (te-form, drop te) + ちゃう (casual)
Examples
1.
宿題を家に忘れてきちゃった。

Shukudai wo ie ni wasure te ki cha ta.
I accidentally left my homework at home.
「Forgetful student at school」
2.
美味しいケーキだから、全部食べてしまった。

Oishii keeki da kara, zenbu tabe te shima ta.
It was a delicious cake, so I ate it all.
「Finishing a sweet treat」
Practice
I'm sorry, I accidentally ate your cake.
ごめん、君のケーキを___。
Romaji also accepted