～てしまうTo do something by accident, To finish completely・totally, Unfortunately

Structure

Verb［て］+ しまう
Verb［て］ + ちゃう⁽¹⁾

⁽¹⁾ じゃう^(*)

^(*) Used when Verb［て］ends with で

Details

About てしまう・ちゃう

By combining the conjunction particle て, with the verb しまう (sometimes written as 終(しま)う), you are able to express that something was done 'by accident', 'completely', or 'unfortunately'. These meanings may seem quite different, but we will discuss their similarities in a moment. Let's look at a few examples of てしまう first.

As we can see, verbs that usually take で instead of て will be no different when using てしまう.

Sometimes, てしまう or でしまう will be shortened to a more casual form, which are often used in speech. These forms are as follows:

てしまう will become ちゃう

でしまう will become じゃう

Fun Fact

While て終(しま)う is most frequently written in hiragana, て仕舞(しま)う may also be seen. There is a slight nuance difference between these two kanji structures, but the primary meaning of しまう will always be that 'something has come to the point where ending/ending up in a specific state cannot be avoided'. This 'no turning back point' may be temporary (likely to be written as 仕舞(しま)う), or it may be permanent (likely to be written as 終(しま)う).

Due to this 'cannot be avoided' nuance, しまう often comes across as 'totally', as in 'ah… I totally left the chicken in the oven for too long'. In these cases, it is simply expressing the speaker's exasperation that something is 'too late' to change. However, despite regularly being used negatively, てしまう can also be used positively. In these cases it still has the nuance of 'no turning back'.

ゲームを始(はじ)める前(まえ)に宿題(しゅくだい)を終(お)わらせてしまおう！

Let's completely finish my homework before I start playing video games! (I'm going to completely finish my homework before I start playing video games)
青木(あおき)先輩(せんぱい)、定時(ていじ)までに社長(しゃちょう)に頼(たの)まれたレポートを完成(かんせい)させてしまいましょうよ。

Aoki senpai, let's completely finish the report that our boss has asked us to do before work is over.

Synonyms

Antonyms

Examples

--:--

傘(かさ)を忘(わす)れてしまった。

I unfortunately forgot my umbrella. (I totally forgot my umbrella)

友達(ともだち)は私(わたし)のケーキを食(た)べてしまった。

My friend finished off my cake. (eaten completely)・(totally)

お皿(さら)が割(わ)れてしまった。

(Someone) accidentally broke a plate. (unfortunately・totally)

今(いま)出(で)ないと遅(おく)れてしまうよ。

If you don't leave now, you will unfortunately be late. (totally)

ごめん！卵(たまご)を全部(ぜんぶ)使(つか)ってしまった。

Sorry! I completely used all the eggs. (Sorry! I totally used all the eggs)

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てしまう・ちゃう – Grammar Discussion

Most Recent Replies (24 in total)

Pablunpro
Hello!

I just saw Kaname Naito’s video on this grammar and thought it was quite clarifying. Would it be a good idea to add it to the オンライン section?

Thank you for your consideration, 良い一日を
xgc1986
Hi, for some reason it says my solution is wrong, is it wrong using the polite form or I am missing something?
Fuga
Hey @xgc1986 !

We have just added わすれてしまいました to the list of answers that would trigger a hint so that the it wouldn’t be counted as wrong!