～とき (〜toki)
Explanation
Expresses the time when something happens, 'when', 'at the time'.
Formation
Verb-casual + とき / い-Adjective + とき / な-Adjective + なとき / Noun + のとき
Detailed Explanation
The ～とき grammar point is used to express the time when something happens or happened. It can be translated as 'when' or 'at the time' in English. The formation differs depending on whether it is used with a verb, い-adjective, な-adjective, or noun.
Examples
公園で遊ぶとき、帽子をかぶりましょう。
Kouen de asobu toki, boushi wo kaburimashou.
When playing in the park, let's wear a hat.
このりんごが赤いとき、食べごろです。
Kono ringo ga akai toki, tabegoro desu.
This apple is ready to eat when it is red.
私が勉強するとき、家族は静かにしてくれます。
Watashi ga benkyou suru toki, kazoku wa shizuka ni shite kuremasu.
When I am studying, my family keeps quiet for me.
子供のとき、よくおばあちゃんの家に遊びに行きました。
Kodomo no toki, yoku obaachan no ie ni asobi ni ikimashita.
When I was a child, I often went to play at my grandmother's house.
Grammar content sourced from hanabira.org.