Japatan
Formação
- N + をもとに(して)
- N + をもとにした + N
Explicação
Shows that something new is made, written, considered, or decided using some material, experience, or story as a source or hint. It is followed by verbs that create something, such as 作る, 書く, 考える, or 決める. Because it is source material, the result may differ freely from the original. Before a noun it becomes をもとにした.
Exemplos
この映画は、実際にあった話をもとに作られた。
This movie was based on a true story.
アンケートの結果をもとにして、新しいメニューを考えた。
We came up with a new menu based on the survey results.
祖母から聞いた昔の話をもとに、絵本を書いた。
I wrote a picture book based on old stories I heard from my grandmother.
日本の昔話をもとにしたゲームが、子どもたちに人気だ。
A game based on Japanese folk tales is popular with children.
Observações
It is similar to に基づいて, but をもとに is for creating something from material; it is not usually used for following laws or rules.
Gramática relacionada
Miniquiz
1旅行で撮った写真（ ）、雑誌の記事を書いた。
Resposta e explicação
Resposta: 2 をもとに
"I wrote a magazine article based on photos I took on my trip." をめぐって is for debates, and に際して and にあたって mark occasions.
2本当にあった話を（ ）映画が人気を集めている。
Resposta e explicação
Resposta: 4 もとにした
"A movie based on a true story is gaining popularity." Before a noun, use をもとにした; もとにして and もとに connect to verbs, not nouns, and をもとで is not a correct form.
3「をもとに」の使い方がいちばん正しい文はどれですか。
Resposta e explicação
Resposta: 3 去年のデータをもとに、来年の計画を立てた。
"Based on last year's data, we made next year's plan." 1 needs a cause (雨で), 2 a companion (友達と), and 4 a time (夏休みに).
