Breakdown of Проверь, закрыта ли застёжка на рюкзаке, а то вещи могут выпасть.
Questions & Answers about Проверь, закрыта ли застёжка на рюкзаке, а то вещи могут выпасть.
Проверь is the imperative form of проверить, which means to check.
So Проверь means Check! when speaking to one person informally.
If you wanted to say it politely or to more than one person, you would say Проверьте.
- проверить = to check, to verify
- Проверь = check!
The particle ли is used to introduce an indirect yes/no question.
So закрыта ли застёжка means something like:
- whether the fastener is closed
- if the clasp is closed
This is different from a direct question:
- Застёжка закрыта? = Is the fastener closed?
After verbs like проверь (check), Russian often uses this X ли... structure:
- Проверь, дома ли он. = Check whether he is at home.
- Спроси, готова ли еда. = Ask whether the food is ready.
In this sentence, ли goes after закрыта because that is the element being questioned.