Ya veremos. Puede ser. Depende.

Not exactly. Ya often means already, but in Ya veremos it has a more conversational sense like we’ll see later, we’ll find out, or time will tell.

So here ya does not really mean already in a literal time sense. It helps give the phrase a feeling of postponing judgment or waiting for more information.

Because Spanish uses the future tense here: veremos = we will see.

That matches the idea that the answer is not known yet and will become clear later. In this expression, the future tense sounds very natural because it refers to something that will be decided or understood in the future.

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

• veremos = we will see
• The ending -emos tells you it is nosotros

So Nosotros ya veremos is possible, but it usually sounds more emphatic than necessary. In normal conversation, Ya veremos is the natural choice.

It depends a lot on tone and context.

It can be:

• neutral: We’ll see
• cautious: Let’s not decide yet
• slightly evasive or dismissive: We’ll see... / Don’t push me yet

So the words themselves are common and normal, but intonation matters a lot.

It is:

• puede = he/she/it can or you can (formal), from poder
• ser = infinitive, to be

Literally, it is it can be. In real use, it often means something like maybe, possibly, or that could be true.

The subject is usually not stated because it is vague or understood from context.

Because Puede ser is the normal expression for that may be, maybe, or that could be the case.

Here ser is used because the speaker is talking about whether something is true or possible in general.

Estar would change the meaning. For example:

• Puede estar cansado = He may be tired
• Puede estar en casa = He may be at home

So estar would usually describe a state, condition, or location, not this general idea of possibility.

It is singular because the hidden subject is something like eso, that, it, or that idea.

So the structure is basically:

• (Eso) puede ser

In English, we often do the same kind of thing with That may be or It could be.

What is omitted is the thing it depends on.

Depende by itself means It depends, but Spanish often leaves the rest unsaid if the context is clear.

A fuller version could be:

• Depende de la situación
• Depende de ti
• Depende de cuándo
• Depende de si viene o no

So the short form works perfectly well in conversation.

Because the verb depender normally takes the preposition de.

So you say:

• depende de algo
• depende de alguien
• depende de si...

Not using de would be incorrect.

Yes. Very naturally.

All three are common short replies in conversation:

• Ya veremos.
• Puede ser.
• Depende.

Spanish, especially in spoken language, often uses short standalone expressions like these when the situation is already clear from context.

Yes, very common. They sound natural and everyday in Spain.

They are especially useful when someone:

• does not want to commit to an answer yet
• thinks something is possible but is not sure
• wants to say that the answer changes according to circumstances

So together, they give a very natural sequence of uncertainty or hesitation.