Breakdown of Успей закрыть окно, прежде чем начнётся град.
Questions & Answers about Успей закрыть окно, прежде чем начнётся град.
Успей is the imperative (command/request form) of the perfective verb успеть (to manage to do something in time / to succeed in doing something before it’s too late).
So Успей закрыть окно means (Make sure you) manage to close the window (in time)—it implies urgency and a deadline.
Russian often uses:
- perfective imperative for a single, completed result: Успей закрыть окно = get it done (before a deadline)
- imperfective imperative for process/repetition/ongoing habit: Успевай is less natural here and would sound like keep managing to…, or could be used in contexts like Успевай записывать (keep up and write it down).
Here you need one completed action (the window ends up closed), so Успей fits best.