¿Puedes cubrir un turno mañana?

Puedes is the tú form of poder, which means to be able to or can.

So ¿Puedes...? means Can you...?

In this sentence, it is a normal present-tense question, but in English we often translate it naturally as a request:

• Can you cover a shift tomorrow?

Spanish often leaves out subject pronouns because the verb ending already shows who the subject is.

• puedo = I can
• puedes = you can
• puede = he/she/it can, or formal you can

So ¿Puedes cubrir un turno mañana? already clearly means Can you cover a shift tomorrow?
Adding tú is possible, but it usually adds emphasis:

• ¿Tú puedes cubrir un turno mañana? = Can you cover a shift tomorrow?

Cubrir literally means to cover, but in work-related contexts it often means to fill in for, to take, or to cover a shift.

So cubrir un turno is a common workplace expression meaning:

• to cover a shift
• to fill in for a shift

It does not mean physically covering something.

Turno is a masculine noun in Spanish, so it takes the masculine indefinite article un.

• un turno = a shift / a turn

In this sentence, turno means work shift, not turn in a queue or conversation.

Here, mañana most naturally means tomorrow.

So the sentence means:

• Can you cover a shift tomorrow?

This is important because mañana can mean either:

• tomorrow
• morning

If you want to say a morning shift, Spanish usually makes that clearer, for example:

• un turno de mañana = a morning shift

So:

• ¿Puedes cubrir un turno mañana? = Can you cover a shift tomorrow?
• ¿Puedes cubrir un turno de mañana? = Can you cover a morning shift?

In Spanish, time expressions like mañana can often go in different positions.

These are all possible:

• ¿Puedes cubrir un turno mañana?
• ¿Mañana puedes cubrir un turno?
• ¿Puedes mañana cubrir un turno?

The version with mañana at the end sounds very natural in everyday speech. It is common to put the time information later in the sentence if the main point is the request itself.

Yes, ¿Puedes...? is very common and natural in everyday speech, especially with coworkers, friends, or people you normally address with tú.

Depending on the situation, Spanish can also sound softer or more polite with forms like:

• ¿Podrías cubrir un turno mañana? = Could you cover a shift tomorrow?
• ¿Puedes cubrir un turno mañana, por favor? = Can you cover a shift tomorrow, please?

If you are speaking to someone formally, you would use usted:

• ¿Puede cubrir un turno mañana?

Spanish uses question marks at both the beginning and the end of a direct question:

• ¿ ... ?

So:

• ¿Puedes cubrir un turno mañana?

This helps the reader know from the start that the sentence is a question.

Yes. In English, we often say shift or work shift. Spanish usually just says turno, and the work meaning is understood from context.

So un turno here can naturally be translated as:

• a shift
• a work shift

Both are fine in English.

A few common options are:

• ¿Puede cubrir un turno mañana?
  Formal you

• ¿Podrías cubrir un turno mañana?
  Less direct, more like Could you cover a shift tomorrow?

• ¿Sería posible que cubrieras un turno mañana?
  More formal and more indirect: Would it be possible for you to cover a shift tomorrow?

The original ¿Puedes cubrir un turno mañana? is direct, natural, and common in everyday workplace Spanish.