Meaning
Used to indicate the time when an action happens.
Formation
- とき is preceded by a modifying form — Vる / Vた / Aい / Aな / Nの
- With action verbs, Vるとき usually means before or during the second event and Vたとき after the first event is done; with state verbs such as いる, Vたとき simply means 'when (it was)': 日本にいたとき
When to use it
- Core use
- When something happens
Examples
20 sentences-
子どものときよく川で遊びました
When I was a child, I often played by the river.
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日本へ行くときパスポートを忘れないでください
When you go to Japan, do not forget your passport.
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分からないときは先生に聞きます
When I do not understand, I ask the teacher.
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暇なときは公園を散歩します
When I have free time, I take a walk in the park.
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魚を焼くときは窓を開けます
When I grill fish, I open the window.
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不安なときは深く息をします
When I feel anxious, I breathe deeply.
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家を出るとき電気を消してください
Please turn off the lights when you leave home.
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忙しいとき友だちが手伝ってくれました
A friend helped me when I was busy.
12 more examples
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病気になったときこの病院へ行きました
I went to this hospital when I became ill.
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地震のときは机の下に入ってください
During an earthquake, please get under a desk.
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朝起きたとき窓を開けます
When I get up in the morning, I open the window.
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道が分からないとき地図を見ます
When I do not know the way, I look at a map.
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子どものときよく祖父の庭で遊びました
When I was a child, I often played in my grandfather's garden.
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暇なとき古い写真を見ます
When I have free time, I look at old photos.
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寒いときこのコートを着ます
When it is cold, I wear this coat.
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家を出るとき窓を閉めてください
Please close the window when you leave home.
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駅に着いたとき母に電話しました
When I arrived at the station, I called my mother.
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日本へ行くとき空港で辞書を買いました
On my way to Japan I bought a dictionary at the airport.
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忙しいときよく忘れ物をします
When I am busy, I often forget things.
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学生のときはこの町に住んでいました
When I was a student, I lived in this town.
Important notes
- The form before とき locates the action relative to the main event.
Common mistakes
- 日本へ行くとき and 日本へ行ったとき differ in viewpoint; do not automatically copy the tense of the main clause.
Check yourself
Pick the translation of each sentence. The wrong options translate similar patterns, so watch the grammar rather than the words.
Similar grammar
Hear it in podcasts
The pattern appears in these episodes. They open in the app with the transcript and translation.
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