Meaning
The nominalizer の lets an action become the object of 忘れる or 知る, or the focused element in のはNです.
Formation
- Plain form + の + を / は / が: 消すのを忘れました
- With perception verbs (見る, 聞こえる) and 待つ only の is used; fixed patterns such as ことができる and ことがある need こと; with 忘れる, 知る or 好き both are often possible
- Focus: …のは + N + です names the place, time or person: 父が生まれたのは北海道です
When to use it
- Core use
- Turns an action into an object or sentence focus
Examples
20 sentences-
電気を消すのを忘れました
I forgot to turn off the light.
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宿題を出すのを忘れないでください
Please do not forget to submit the homework.
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田中さんが退院するのを知っていますか
Do you know that Mr. Tanaka is leaving the hospital?
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駅が移ったのを知りませんでした
I did not know that the station had moved.
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父が生まれたのは北海道です
It was in Hokkaido that my father was born.
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日本へ来たのは去年です
It was last year that I came to Japan.
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子どもたちが公園で遊んでいるのを見ました
I saw the children playing in the park.
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隣の部屋で誰かが歌っているのが聞こえます
I can hear someone singing in the next room.
12 more examples
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窓から雪が降るのを見ていました
I was watching the snow fall from the window.
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雨がやむのを待っています
I am waiting for the rain to stop.
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一人で旅行するのは楽しいです
Travelling alone is fun.
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漢字を覚えるのは難しいです
Memorizing kanji is difficult.
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古い雑誌を捨てるのを忘れました
I forgot to throw away the old magazines.
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台所の窓を開けるのを忘れました
I forgot to open the kitchen window.
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毎朝早く起きるのは大変です
Getting up early every morning is hard.
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母が晩ご飯を作るのを手伝いました
I helped my mother make dinner.
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妹は絵をかくのが上手です
My younger sister is good at drawing.
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私は料理をするのが好きです
I like cooking.
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みんなの前で歌うのは恥ずかしいです
Singing in front of everyone is embarrassing.
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晩ご飯の準備をするのを忘れました
I forgot to prepare dinner.
Important notes
- の can nominalize a perceived event — 鳥が飛ぶのを見た.
Common mistakes
- Do not interchange の and こと in every pattern: ことができる is the fixed ability construction.
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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