Japatan
Formação
- V普通形 + ことから
- いA + ことから
- なA + な / である + ことから
- N + である + ことから
Explicação
There are two uses. (1) Basis for a judgment: from the fact that ~, one can tell or infer ~. The second half often has 分かる, 考えられる or ようだ. (2) Origin of a name: because of ~, it is called or was named ~. Both are written-style and common in explanations and news.
Exemplos
この町は桜の木が多いことから、「花の町」と呼ばれている。
This town is called the Town of Flowers because it has many cherry trees.
道がぬれていることから、夜の間に雨が降ったことが分かる。
From the fact that the road is wet, we can tell it rained during the night.
この地域は交通が便利なことから、若い家族に人気がある。
This area is popular with young families because transportation is convenient.
彼女はプロの料理人であることから、友人によく料理の作り方を聞かれる。
Because she is a professional cook, her friends often ask her how to make dishes.
Observações
The second half cannot be a request, command or intention; use から or ので in those cases.
Miniquiz
1この橋は形が月に似ている（ ）、「月見橋」と名付けられた。
Resposta e explicação
Resposta: 2 ことから
This bridge was named Tsukimibashi because its shape looks like the moon. ことから explains the origin of a name. からには shows determination, and からといって needs a negative ending.
2部屋の電気がついている（ ）、兄はもう帰ってきているようだ。
Resposta e explicação
Resposta: 4 ことから
From the fact that the light is on in the room, it seems my brother is already home. ことから gives the basis for a judgment. The other choices express contrast or need a negative ending.
3この辺りは交通が便利（ ）、昔から多くの店が集まってきた。
Resposta e explicação
Resposta: 1 なことから
Because transportation is convenient in this area, many shops have gathered here since long ago. With a な-adjective, the form is 便利なことから (or 便利であることから).
