……
Breakdown of eki de kasa wo wasurete simaimasita.
をwo
direct object particle
でde
location particle
駅eki
station
忘れるwasureru
to forget
〜て〜te
connective form
しまうsimau
to end up (regretfully)
傘kasa
umbrella
Questions & Answers about eki de kasa wo wasurete simaimasita.
Why is で used after 駅 instead of に?
The particle で indicates the location where an action takes place. Since the act of forgetting (忘れる) happens at the station, you say 駅で. Using に would suggest a point of arrival or destination, not the setting of an action, so 駅に would sound odd here.
What role does を play in 傘を忘れてしまいました?
Particle を marks the direct object of a transitive verb. Here, 傘 is what is being forgotten, so it takes を to show it is the object of 忘れる.
What nuance does ～てしまいました add compared to just 忘れました?
The construction verb-stem + てしまう expresses that something is completed with a nuance of regret, accident, or unintended result. In polite past form (てしまいました), it means “unfortunately ended up doing X.” So 忘れてしまいました conveys “I ended up forgetting (and I regret it).”
How would you say this sentence more casually in spoken Japanese?
In informal speech, てしまいました often contracts to ちゃった. So you could say:
駅で傘を忘れちゃった。
Could you use a different verb to express “leaving something behind” instead of 忘れる?
Yes. 置き忘れる means “to leave behind accidentally.” So you could say:
駅で傘を置き忘れました。
This emphasizes you left it behind by accident, but the overall meaning is very similar.
What is the reading of this sentence in hiragana?
えきで かさを わすれてしまいました。
What level of politeness is used here, and how would you make it plain?
Using ～ました makes the sentence polite. To make it plain (casual), you’d drop ～ました and use plain past:
駅で傘を忘れた。
Why not say 駅で傘を忘れた if I just want to mean “I forgot my umbrella at the station”?
You can say 駅で傘を忘れた, but it simply states the fact without any nuance of regret and is in plain form. 忘れてしまいました adds politeness and expresses that you’re sorry or embarrassed about forgetting it.
More from this lesson
AI Language TutorTry it ↗
“How do verb conjugations work in Japanese?”
Japanese verbs conjugate based on tense, politeness, and mood. For example, the polite present form adds ‑ます to the verb stem, while the past tense uses ‑ました. Unlike English, Japanese verbs don't change based on the subject — the same form works for "I", "you", and "they".
Sign up free — start using our AI language tutor
Start learning JapaneseMaster Japanese — from eki de kasa wo wasurete simaimasita to fluency
All course content and exercises are completely free — no paywalls, no trial periods.
- ✓ Infinitely deep — unlimited vocabulary and grammar
- ✓ Fast-paced — build complex sentences from the start
- ✓ Unforgettable — efficient spaced repetition system
- ✓ AI tutor to answer your grammar questions