In Japanese, the expression ～てしまいました (te shimaimashita) is used to indicate that something has been completed, often with a sense of regret, disappointment, or that something happened unintentionally. It carries a nuance beyond simple completion; it suggests a consequence or feeling associated with the completed action. Think of it as the Japanese equivalent of "I've gone and done it!" or "I've ended up doing it...".
How to Use ～てしまいました
Attach ～てしまいました to the te-form of a verb. If you aren't familiar with the te-form, consider reviewing that first! (Though we will cover a very quick review below).
Structure:
[Verb (te-form)] + しまいました
Quick Te-Form Review:
Here's a simplified recap of te-form conjugation. Note that there are irregularities, but these are the basic rules.
Group 1 (う verbs): (Verbs ending in う, つ, る, む, ぶ, ぬ, く, ぐ, す)
う、つ、る → って
む、ぶ、ぬ → んで
く → いて (Exception: 行く (iku) becomes 行って (itte))
ぐ → いで
す → して
Group 2 (る verbs): (Verbs ending in いる or える)
Simply drop the る and add て
Group 3 (Irregular verbs):
する → して
来る (くる - kuru) → 来て (きて - kite)
Examples
Japanese
Romaji
English Translation
パスポートをなくしてしまいました。
pasupooto o nakushite shimaimashita
I (unfortunately) lost my passport.
宿題を忘れてしまいました。
shukudai o wasurete shimaimashita
I (regretfully) forgot my homework.
財布を落としてしまいました。
saifu o otoshite shimaimashita
I dropped my wallet (oh no!).
ケーキを全部食べてしまいました。
keeki o zenbu tabete shimaimashita
I ate all the cake (I shouldn't have!).
電車に傘を忘れてしまいました。
densha ni kasa o wasurete shimaimashita
I left my umbrella on the train (again!).
大切な書類を破いてしまいました。
taisetsu na shorui o yaite shimaimashita
I tore up the important documents (Oh no, what have I done?).
約束の時間に遅れてしまいました。
yakusoku no jikan ni okurete shimaimashita
I was late for the appointment time (I feel bad!).
予約を間違えてしまいました。
yoyaku o machigaete shimaimashita
I made a mistake with the reservation (now what?).
Casual Forms
In casual speech, しまいました becomes しまった (shimatta) or ちゃった (chatta) / じゃった (jatta) for some verbs. These forms are even more likely to carry a nuance of regret or accident.
しまった (shimatta): This is a more direct, less softened version of しまいました. Use it among close friends and family, or when speaking to yourself.
ちゃった (chatta) / じゃった (jatta): This form is a contraction of ～てしまった. ちゃった is used after verbs ending in ～て, ～で, ～して, while じゃった is used after verbs ending in ～んで.
Japanese
Romaji
English Translation
Original Verb
Te-Form
食べちゃった。
tabechatta
I ate it (by accident/regretfully).
食べる (taberu)
食べて
飲んじゃった。
nonjatta
I drank it (oops).
飲む (nomu)
飲んで
忘れちゃった。
wasurechatta
I forgot (oops).
忘れる (wasureru)
忘れて
読んじゃった。
yonjatta
I read it (all already!).
読む (yomu)
読んで
見ちゃった。
michatta
I saw it (and maybe I wasn't supposed to).
見る (miru)
見て
寝ちゃった。
nechatta
I fell asleep (when I shouldn't have).
寝る (neru)
寝て
壊しちゃった。
kowashichatta
I broke it (accidentally).
壊す (kowasu)
壊して
落としちゃった。
otoshichatta
I dropped it (unintentionally).
落とす (otosu)
落として
しちゃった。
shichatta
I did it (and now I regret it/it's done).
する (suru)
して
来ちゃった。
kichatta
I came (and maybe I shouldn't have/now I'm here).
来る (kuru)
来て
When to Use
When something happened unintentionally or by accident: This is a very common use case.
When you regret an action or outcome: You did something, and now you wish you hadn't.
When something is completed (sometimes neutral, but often with emotion): While it can be neutral, ～てしまいました often implies a feeling about the completion, whether it's relief, sadness, or something else. It adds a sense of "it's done and gone."
Expressing deep apologies: The te-form plus shimaimashita adds a layer of sincerity and acknowledgement of the trouble caused.
Let's look at some more specific scenarios:
Eating the last piece of cake: You might say "ケーキを全部食べちゃった！" (keeki o zenbu tabechatta!) implying you ate the last piece, and maybe someone else wanted it.
Missing the train: "電車に乗り遅れてしまいました。" (densha ni noriokurete shimaimashita) means you missed the train, likely causing inconvenience. The 'shimaimashita' adds regret.
Spilling a drink: "ジュースをこぼしてしまいました。" (juusu o koboshite shimaimashita) means you spilled the juice, and it implies you didn't mean to and are probably feeling bad about it.
Finishing a task: "レポートを書き終えてしまいました。" (repooto o kaki oete shimaimashita) – I finished writing the report. While seemingly neutral, it can imply relief that it's finally done.
Nuances and Subtleties
The use of ～てしまいました is highly contextual. The tone of voice, facial expression, and overall situation all contribute to the meaning. A simple sentence like "食べちゃった" can convey a wide range of emotions, from playful guilt to genuine regret, depending on how it's said.
Consider these scenarios:
Scenario 1: A child eats the last cookie.
Child: "クッキー食べちゃった！" (kukkii tabechatta!) - Said with a sheepish grin, it's more of an admission than deep regret.
Scenario 2: An employee accidentally deletes an important file.
Employee: "ファイルを削除してしまいました！" (fairu o sakujo shite shimaimashita!) - Said with a panicked tone, it expresses genuine distress and regret.
Scenario 3: Talking to a friend who studied really hard for a test that he failed
Person A: 試験どうだった？ (shiken dou datta?) - How was your exam?
Person B: あー、落ちてしまっった。(aa, ochite shimatta.) - Ah, I failed.
Beyond Regret: ～てしまう as a Habit or Inevitability
While often used for regret, ～てしまう can also express a habitual action or something that inevitably happens. This usage is less common for beginners but important to recognize.
"いつも寝てしまうんです。" (itsumo nete shimau n desu.) - I always end up falling asleep. (It's a habit.)
"彼はいつも最後に全部食べてしまう。" (kare wa itsumo saigo ni zenbu tabete shimau.) - He always ends up eating everything in the end.
"ストレスが溜まると、つい食べすぎてしまう。" (sutoresu ga tamaruto, tsui tabesugite shimau.) - When I get stressed, I end up overeating.
In these cases, the nuance shifts from immediate regret to a general tendency or unavoidable outcome.
Practice
Let's test your understanding. Fill in the blanks with the correct form of the verb + しまいました/しまった/ちゃった/じゃった. Pay attention to the context to choose the most appropriate form.
Question 1: You accidentally broke your friend's favorite mug.
友達のマグカップを (壊す - kowasu) ____________。
Answer:
友達のマグカップを壊してしまいました (kowashite shimaimashita) / 壊しちゃった (kowashichatta)。
Question 2: You forgot to bring your homework to school.
学校に宿題を (持ってくる - mottekuru) ____________。
Answer:
学校に宿題を持ってくるのを忘れてしまいました (mottekuru no o wasurete shimaimashita) / 忘れちゃった (wasurechatta)。
Question 3: You ate all the ice cream in the fridge.
冷蔵庫のアイスクリームを全部 (食べる - taberu) ____________。
Answer:
冷蔵庫のアイスクリームを全部食べちゃった (tabechatta)。
Question 4: You lost your train ticket.
電車の切符を (なくす - nakusu) ____________。
Answer:
電車の切符をなくしてしまいました (nakushite shimaimashita) / なくしちゃった (nakushichatta)。
Question 5: You accidentally sent an email to the wrong person.
Translate the following sentences into Japanese, using ～てしまいました.
Question 1: I overslept this morning.
Answer:
今朝、寝坊してしまいました。(kesa, nebō shite shimaimashita.)
Question 2: I drank too much last night.
Answer:
昨夜、飲みすぎてしまいました。(sakuya, nomisugite shimaimashita.) / 飲みすぎちゃった。(nomisugichatta.)
Question 3: I spent all my money.
Answer:
お金を全部使ってしまいました。(okane o zenbu tsukatte shimaimashita.) / お金を全部使っちゃった。(okane o zenbu tsukatchatta.)
Question 4: I forgot my friend's birthday.
Answer:
友達の誕生日を忘れてしまいました。(tomodachi no tanjōbi o wasurete shimaimashita.) / 友達の誕生日を忘れちゃった。(tomodachi no tanjōbi o wasurechatta.)