てしまう

Done and over / Oops: completion and regret

'I accidentally ate the whole cake', 'I forgot my homework' — てしまう expresses completion, often with a tinge of regret.

What you'll learn

• てしまう = completed (often with regret)
• Casual shorthand: ちゃった
• Express regret or accidental actions

JLPT N3 Japanese self-study — interactive practice, instant feedback, completely free.