Si traes el taburete de la cocina, podré subir y limpiar el alféizar.

In Spanish, after si for a real or likely condition, you normally use the present indicative, not the future:

• Si traes... = if you bring...
• Si vienes... = if you come...

Then the main clause can use the future:

• Si traes el taburete, podré...

English often uses the present here too: If you bring the stool, I’ll be able...

So si traerás is not the normal choice in this kind of sentence.

Podré is the future of poder: I will be able to.

It fits the idea of the sentence: first you bring the stool, then as a result I will be able to get up and clean.

Compare:

• podré = I will be able to
• puedo = I can / I’m able to
• podría = I could / would be able to

So:

• Si traes el taburete, podré subir... = a normal future result
• Si traes el taburete, puedo subir... = also possible in conversation, a bit more immediate
• Si trajeras el taburete, podría subir... = more hypothetical / less direct

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

• traes clearly means you bring (singular, informal)

So Si traes... already means If you bring... and adding tú is usually unnecessary.

You could say Si tú traes..., but that would usually add emphasis or contrast, for example:

• Si tú traes el taburete, yo limpio el alféizar.

Because this sentence describes a real, possible condition, Spanish uses:

• si + present indicative
• main clause with future / present / imperative, depending on meaning

So:

• Si traes el taburete, podré...

Not:

• Si traigas... ❌

After si, the present subjunctive is generally not used in this kind of condition.

Si trajeras... would be a different structure, meaning something more hypothetical:

• Si trajeras el taburete, podría subir... = If you brought the stool, I could get up...

Taburete means stool, usually a small seat without a back.

It is not quite the same as:

• silla = chair
• banqueta = bench / sometimes stool, depending on region
• escalera = ladder / stepladder

In this sentence, taburete suggests a small stool someone can stand on or use to reach something higher.

Alféizar means windowsill.

It is a perfectly correct word, though some learners may not meet it very early because it is a bit more specific than everyday verbs like comer or ir.

You may hear it in household contexts:

• limpiar el alféizar
• poner plantas en el alféizar

It refers to the ledge at the bottom of a window.

Spanish often uses the definite article when talking about a specific thing that both speakers can identify from the situation.

Here, el alféizar means the windowsill—the one they already have in mind.

Using un alféizar would sound like a windowsill, which is less natural here because the speaker is clearly referring to a particular one.

Because de + place is a common way to specify which noun you mean:

• el taburete de la cocina = the stool from/in the kitchen

It narrows down the noun:

• not just any stool
• specifically the kitchen stool

This structure is very common in Spanish:

• la mesa del salón
• las llaves del coche
• la ventana de mi cuarto

Because after poder, Spanish normally uses an infinitive:

• podré subir
• podré limpiar

This is the same pattern as in English:

• I will be able to get up
• I will be able to clean

So the structure is:

• poder + infinitive

In this sentence, one podré applies to both infinitives:

• podré subir y limpiar...

Here subir means something like go up, climb up, or get up onto something.

Because the stool is mentioned, the idea is:

• bring the stool
• then I can get up on it
• then I can clean the windowsill

Spanish can express this in different ways:

• podré subir = I’ll be able to get up / climb up
• podré subirme = I’ll be able to climb up / get myself up

Both are possible, but subir on its own is completely natural here.

Yes. Si me traes el taburete... would also be very natural.

The difference is:

• Si traes el taburete... = If you bring the stool...
• Si me traes el taburete... = If you bring me the stool...

Adding me makes it clearer that the person is bringing it to the speaker.

Without me, the idea is still understandable from context.

It is standard and helpful to put a comma after the introductory si clause:

• Si traes el taburete de la cocina, podré subir y limpiar el alféizar.

This matches normal punctuation in both Spanish and English when the conditional clause comes first.

If the order were reversed, the comma is often omitted:

• Podré subir y limpiar el alféizar si traes el taburete de la cocina.

The stress falls on fé:

• al-FÉ-i-zar

The written accent mark tells you that.

A rough English-friendly guide would be:

• ahl-FEH-ee-thar in much of Spain
• or ahl-FEH-ee-sar in areas without the th sound

In standard Peninsular Spanish, z is often pronounced like the th in thin.

Yes. The original sentence is correct, but there are several natural alternatives depending on tone and context, for example:

• Si traes el taburete de la cocina, podré subir para limpiar el alféizar.
• Si me traes el taburete de la cocina, podré limpiar el alféizar.
• Tráeme el taburete de la cocina y podré subir a limpiar el alféizar.

The original version is already good Spanish. These are just stylistic alternatives, not corrections.