Пиши сообщение, когда устройство зарядится.

to write

Breakdown of Пиши сообщение, когда устройство зарядится.

• когда: when
• сообщение: the message
• устройство: the device

Questions & Answers about Пиши сообщение, когда устройство зарядится.

Why is Пиши used instead of the perfective imperative Напиши?

Пиши is the imperfective imperative, which focuses on the ongoing action or general instruction (“be writing the message when…”). The perfective Напиши would stress the completion of a single, one-off action (“finish writing/send the message”). In many contexts both are acceptable, but Пиши sounds more like a general guideline, while Напиши would emphasize “make sure you do it once.”

What case is сообщение in, and why?

Сообщение is in the accusative case as the direct object of пиши. For neuter nouns like сообщение, the nominative and accusative singular forms are identical, so you see сообщение in both cases.

Why is there a comma before когда?

Because когда устройство зарядится is a subordinate clause (a time clause). In Russian, you always separate a main clause and a subordinate clause with a comma, regardless of their order.

Why do we use the perfective зарядится instead of the imperfective заряжаться?