Ты можешь подождать в кафе, пока я вернусь.

You can wait in the cafe until I come back.

Breakdown of Ты можешь подождать в кафе, пока я вернусь.

• я: I
• в: in
• подождать: to wait
• ты: you
• пока: until
• вернуться: to come back
• мочь: can/to be able
• кафе: cafe

Questions & Answers about Ты можешь подождать в кафе, пока я вернусь.

Why is it Ты, and when would I use Вы instead?

Ты is the informal singular you, used with friends, family, children, and peers in casual situations.
Вы is used for:

• polite/formal singular (to a stranger, older person, customer, etc.)
• plural you (talking to more than one person)

With Вы, the sentence becomes: Вы можете подождать в кафе, пока я вернусь.

What does можешь mean here, and how is it formed?

можешь is the 2nd person singular present form of мочь (to be able to / can).
Conjugation (present):

• я могу
• ты можешь
• он/она может
• мы можем
• вы можете
• они могут

In this sentence it’s a friendly can/you may meaning: you are able to / it’s okay for you to wait.

How is Ты можешь… different from Можно…?

Ты можешь… addresses the person directly: You can / you’re able to…
Можно… is impersonal: It’s allowed/possible to…

Compare:

• Ты можешь подождать в кафе… = You can wait in the café… (speaking to you)
• Можно подождать в кафе… = One can/it’s possible to wait in the café… (more general, less direct)

Why is the verb подождать (perfective) instead of ждать (imperfective)?

подождать is perfective and commonly means to wait for a while / to wait a bit—a bounded, limited waiting.
ждать is imperfective and focuses on the process of waiting, often more open-ended.

So:

• подождать fits well for “wait until I return” (a defined endpoint).
• ждать can sound more like “to be waiting” as an ongoing activity.

What does the prefix по- add in подождать?

In подождать, по- often adds the idea of waiting for a short time or for a bit. It makes the action feel limited/contained. It doesn’t necessarily mean “a little” in a strict sense, but it strongly suggests “wait (for some time).”

Why is it в кафе—what case is кафе in, and why doesn’t it change?

в кафе uses в + prepositional case to mean “in (a place).”
кафе is an indeclinable noun (often loanwords ending in -е/-э), so it looks the same in all cases. Functionally it’s still prepositional here: в кафе = in a café.

Why is there a comma before пока?

Because пока я вернусь is a subordinate clause introduced by пока (while / until). In Russian, subordinate clauses are normally separated by a comma:

• …в кафе, пока я вернусь.

Does пока mean “while” or “until” here?

Here пока is best understood as until: you wait up to the point when the speaker returns.
In other contexts it can mean while (simultaneous actions), but with a “waiting until X happens” idea, until is the natural interpretation.

Why is it вернусь (perfective future) and not возвращаюсь?

вернусь is perfective and means I will return (as a completed event)—a clear endpoint for the waiting.
возвращаюсь is imperfective; it can mean “I’m returning” (in progress) or can be used for future in some contexts, but it emphasizes the process rather than the completed return.

So пока я вернусь pairs well with the idea of a definite endpoint.

Can I change the word order? For example: Пока я вернусь, ты можешь подождать в кафе.

Yes. Russian word order is flexible, and this rearrangement is grammatical:

• Пока я вернусь, ты можешь подождать в кафе.

The difference is emphasis/topic:

• Original (Ты можешь… пока…) focuses first on what you can do.
• Starting with Пока я вернусь… foregrounds the time condition first.