Skip to content
Kotomora
JLPT N4EverydayOften regret

てしまう・ちゃうfinish it all; end up doing

Something is done, and it can't be undone. Most often that is bad news: you forgot, lost or broke something. It can also just mean all finished. In conversation it shortens to ちゃう or じゃう.

How to form it

Verb in the て-form + しまう

しまう changes like a godan verb (う-verb): しまいます, しまった, しまって, しまおう.

In conversation

てしまう → ちゃう  でしまう → じゃう

食たべてしまった → 食たべちゃった, 飲のんでしまった → 飲のんじゃった.

It happened, and you wish it hadn't

This is the use you'll hear most. English has no single word for it: "I went and…", "I ended up…", or just a sigh.

Apologies use it, because of what it adds to the plain past.

All done

With something you meant to do, it says you do the whole of it, or get it out of the way. 全ぜん部ぶ often comes with it.

Which of the two is it? What happened tells you: nobody wants to lose an umbrella, and nobody finishes a novel by accident. Often it is both at once.

In conversation: ちゃう・じゃう

In casual talk people mostly say ちゃう and じゃう. With ます it is still friendly: 忘わすれちゃいました. A written apology or a talk with a customer keeps the full form.

FullIn conversation
Will食たべてしまう食たべちゃう
Did食たべてしまった食たべちゃった
Let's食たべてしまおう食たべちゃおう
After で飲のんでしまった飲のんじゃった

The て or で goes: not 食たべてちゃった. する → しちゃう, 来くる → 来きちゃう, 行いく → 行いっちゃう.

About to go wrong

When it is something nobody wants and it hasn't happened yet, ちゃう is a worry or a warning.

Things you'll hear

しまったoh no

Oh no. I forgot my homework.

The helper by itself, said the moment you notice a mistake.

やっちゃったI've done it now

Oh, I've done it now. I spilled the coffee.

つい〜ちゃうcan't help doing

When there are sweets around, I can't help eating them.

買かっちゃったwent and bought it

It was expensive, but I went and bought it.

Not really sorry: you gave in, and you're pleased.

The other ちゃ

ちゃいけない・ちゃだめN5

The same ちゃ sound, but here it is short for ては: "must not". What follows tells you which.

Close neighbours

終おわるN4

A verb stem + 終おわる says only that you reached the end. てしまう adds how you feel about it.

Check yourself

1What does this mean?

あ、塩しおを入いれちゃった。

Choose an answer to see why.

2Which one is the short form of 読よんでしまった?

Choose an answer to see why.

More detail

Sometimes the news is good

Something is over sooner than you feared.

しまう and ちまう

By itself, しまう means to put something away. ちまう and じまう are a rougher version heard in films and anime.

More sentences

てしまう・ちゃう (teshimau / chau) – finish it all; end up doing