Es posible que cambie el punto de encuentro.

Because es possible que is an expression of possibility/uncertainty, and in Spanish that normally triggers the subjunctive in the following clause.

So:

• Es posible que cambie... = It’s possible that it may change / might change

You would not normally say Es posible que cambia... in standard Spanish, because the indicative sounds too certain after es posible que.

Cambie is the present subjunctive of cambiar.

Here is the present subjunctive for cambiar:

• yo cambie
• tú cambies
• él/ella/usted cambie
• nosotros/nosotras cambiemos
• vosotros/vosotras cambiéis
• ellos/ellas/ustedes cambien

In this sentence, the subject is most naturally el punto de encuentro, so cambie means changes / may change / might change.

Those forms express a more direct future idea:

• va a cambiar = is going to change
• cambiará = will change

But es posible que introduces uncertainty, so Spanish prefers the subjunctive:

• Es posible que cambie = It’s possible that it may change / might change

So the sentence is not making a firm prediction. It is only saying the change is possible.

Here que means that and links the two parts of the sentence:

• Es posible = It’s possible
• que cambie el punto de encuentro = that the meeting point may change

In Spanish, que is extremely common after expressions like:

• Es posible que...
• Es probable que...
• Es importante que...
• Quiero que...

El punto de encuentro literally means the meeting point or meeting place.

Depending on context, it could refer to:

• the place where people plan to meet
• an agreed location
• a rendezvous point

In everyday English, you might translate it as:

• the meeting point
• the place where we’re meeting

Because Spanish often allows flexible word order, especially when the subject is not a person and the sentence is presenting information neutrally.

So:

• Es posible que cambie el punto de encuentro.

is very natural.

You could also say:

• Es posible que el punto de encuentro cambie.

That version is also correct and perhaps slightly clearer for a learner, because the subject comes before the verb. Both mean the same thing.

The subject is most naturally el punto de encuentro.

So the sentence means:

• It’s possible that the meeting point may change

not

• It’s possible that he/she changes the meeting point

Why? Because there is no clear person doing the action, and el punto de encuentro fits naturally as the thing that changes.

If you wanted to say someone changes the meeting point, Spanish would usually make that clearer, for example:

• Es posible que cambien el punto de encuentro. = It’s possible that they may change the meeting point.
• Es posible que cambie el punto de encuentro alguien would sound odd in most contexts.

Grammatically, cambie could be he/she/it/I in the present subjunctive, so in isolation there is some ambiguity.

However, in this sentence, the most natural reading is that the meeting point itself may change.

If Spanish wanted to clearly say he/she may change the meeting point, it would usually include the subject or make it obvious from context:

• Es posible que ella cambie el punto de encuentro.
• Es posible que lo cambien.

So yes, the verb form alone is ambiguous, but the full sentence strongly suggests the meeting point may change.

Because possible is treated as a general quality or assessment, so Spanish uses ser, not estar.

• es posible = it is possible

This is similar to other impersonal expressions:

• es importante
• es normal
• es probable
• es difícil

Estar posible is not natural here.

Yes. Puede que... is a very common alternative and it also takes the subjunctive.

So these are both natural:

• Es posible que cambie el punto de encuentro.
• Puede que cambie el punto de encuentro.

Both mean roughly It’s possible that the meeting point may change / The meeting point might change.

Puede que... is often a bit more conversational and compact.

Yes, but it means something different.

• Es posible que cambie el punto de encuentro.
  = It’s possible that the meeting point may change.

• Es posible cambiar el punto de encuentro.
  = It is possible to change the meeting point.

The first sentence talks about a possibility that something will happen.
The second talks about whether it can be done.

That difference—que + subjunctive versus infinitive—is very important in Spanish.

Depending on context, natural English translations could be:

• The meeting point might change.
• It’s possible that the meeting point will change.
• The meeting point may change.

Even though the Spanish starts with Es posible que..., English often prefers the simpler might/may version.

Yes, it sounds perfectly natural and standard.

It would fit in situations like:

• travel plans
• event organisation
• group messages
• appointments
• tours or excursions

For example:

• Atención: es posible que cambie el punto de encuentro.

That sounds like something you could genuinely hear or read in Spain.

In standard peninsular Spanish, cambie is pronounced roughly kam-BYEh.

A few helpful points:

• ca = like ka
• mb is pronounced together smoothly
• ie sounds like yeh in one syllable after the b

So:

• cambie ≈ KAM-byeh

And the full phrase:

• el punto de encuentro

in Spain has the c in encuentro as a hard k sound, because it comes before u.

Spanish often leaves out subjects and dummy pronouns that English uses.

In English, we say:

• It is possible that...

That it does not really refer to anything concrete. It is just a grammatical placeholder.

In Spanish, no placeholder is needed:

• Es posible que...

So Spanish is more compact here.

Yes. Spanish has several ways to adjust the level of certainty.

Less certain:

• Puede que cambie el punto de encuentro. = The meeting point might change.
• Es posible que cambie el punto de encuentro. = It’s possible that the meeting point may change.

More certain:

• Probablemente cambiará el punto de encuentro. = The meeting point will probably change.
• Seguramente cambiará el punto de encuentro. = The meeting point will surely/probably change.
• El punto de encuentro va a cambiar. = The meeting point is going to change.

So the original sentence sits in the uncertain/possible range.