~てしまう

宿題をするのを忘れてしまって、先生に怒られた。

I forgot to do my homework and got scolded by the teacher.

Here, 'しまって' indicates regret or a negative outcome of forgetting.

ついにこの本を読み終えてしまった。とても感動した。

I finally finished reading this book. I was deeply moved.

In this case, 'しまって' emphasizes the completion of reading, and it can also imply a slight sense of loss that the enjoyable activity is over.

昨日買ったケーキを全部食べてしまった。

I ate all the cake I bought yesterday.

'しまって' here indicates completion, often with a nuance of having done something completely, perhaps a bit too much or too quickly.

うっかり電車の中に傘を忘れてきてしまった。

I carelessly left my umbrella on the train.

'しまって' clearly conveys regret or an unintentional negative action.

レポートの締め切りに間に合わず、提出しそびれてしまった。

I missed the report deadline and ended up not submitting it.

This use of 'しまって' highlights a negative consequence due to a mistake or oversight.

楽しすぎて、終電を逃してしまった。

I had too much fun and missed the last train.

Here, 'しまって' denotes an unfortunate outcome caused by the enjoyment.

彼の秘密をうっかり話してしまい、後悔している。

I accidentally revealed his secret and regret it.

'しまって' expresses regret over an unintentional action.

せっかく作った料理を焦がしてしまった。

I burned the meal I went to the trouble of making.

This example uses 'しまって' to show regret over a spoiled effort.

昨日ついつい夜更かしをしてしまって、今日は一日中眠いです。

Yesterday, I ended up staying up late, so today I'm sleepy all day.

Describes an action completed unintentionally or with regret.

この本、面白すぎてあっという間に読んでしまいました。

This book was so interesting that I read it in no time.

Indicates an action completed quickly or thoroughly, often with a sense of surprise.

電車に傘を忘れてきてしまいました。全く困ったものです。

I left my umbrella on the train. It's really troublesome.

Expresses regret or trouble caused by the completed action.

大事な書類をコーヒーで汚してしまい、上司に叱られました。

I stained important documents with coffee and was scolded by my boss.

Highlights the negative consequence of a completed action.

締め切りに間に合わせるために、徹夜で仕事を片付けてしまいました。

To meet the deadline, I finished the work overnight.

Shows an action completed thoroughly or to its conclusion, often with effort.

うっかり秘密を話してしまい、後でとても後悔しました。

I accidentally revealed a secret and regretted it very much later.

Conveys an action completed unintentionally and with subsequent regret.

子供がおもちゃを壊してしまい、泣き出してしまいました。

The child broke the toy and started crying.

Describes an action completed with a negative outcome, affecting others.

こんなに美味しいケーキ、一人で全部食べてしまってもいいですか？

This cake is so delicious, is it okay if I eat it all by myself?

Used to express a desire to complete an action entirely, sometimes with a playful or slightly guilty nuance.