来る

In a sentence

• 明日、彼が学校に来る。

  He will come to school tomorrow.

  Here, '来る' is used in its primary meaning of 'to come', indicating movement towards a specific location.

• 雨が降ってきた。

  It started to rain.

  In this sentence, '来る' is used as part of the phrase '降ってきた', implying the action of rain starting and coming into the scene, often used to describe phenomena starting or arriving.

• そのメールがやっと来た。

  That email finally arrived.

  Here, '来る' conveys the meaning of arrival, as in the receipt of an expected item or information.