Ara estic preparant la motxilla i la tovallola perquè demà anem a nedar.

Estic preparant is the present progressive: estar + gerund. It highlights that the action is happening right now.

• estic preparant = I am preparing
• preparo = I prepare / I’m preparing

In Catalan, the simple present preparo can also sometimes mean I’m preparing, especially when the context already makes it clear. But estic preparant makes the ongoing action more explicit.

So:

• Ara estic preparant... = I’m preparing ... right now
• Ara preparo... = also possible, but a little less focused on the action being in progress

Not strictly. Ara means now, so it reinforces the time reference.

Without ara, the sentence still works:

• Estic preparant la motxilla i la tovallola...

But ara is very natural because it helps set up a contrast with demà later in the sentence:

• Ara ... = now
• demà ... = tomorrow

So the sentence neatly contrasts present and future.

Because Catalan usually drops subject pronouns when the verb ending already makes the subject clear.

Here:

• estic already means I am
• anem already means we go / we’re going

So Catalan normally says:

• Ara estic preparant...
• demà anem a nedar

rather than:

• Ara jo estic preparant...
• perquè demà nosaltres anem a nedar

The pronouns jo and nosaltres would only be added for emphasis, contrast, or clarity.

Because in Catalan it is normal to use the article with each noun in a coordination like this.

So:

• la motxilla i la tovallola

is the natural full form.

Both nouns are:

• feminine
• singular

so they both take la.

Repeating the article sounds more complete and natural in standard Catalan than leaving it out before the second noun.

La is the definite article, so it refers to specific things the speaker has in mind: the backpack and the towel.

That fits the sentence well, because the speaker is probably talking about the items needed for tomorrow’s swim.

Compare:

• la motxilla i la tovallola = the backpack and the towel
• una motxilla i una tovallola = a backpack and a towel

If the speaker wanted to emphasize ownership, they could say:

• la meva motxilla i la meva tovallola = my backpack and my towel

But Catalan often leaves out the possessive when it is obvious from context.

Here perquè means because.

So:

• ... perquè demà anem a nedar = ... because tomorrow we’re going swimming

It is written as one word with an accent because that is the standard spelling for this conjunction.

A common point of confusion is:

• perquè = because
• per què = why / for what reason

So:

• Per què ho fas? = Why are you doing it?
• Ho faig perquè vull. = I’m doing it because I want to.

Catalan often uses the present tense to talk about a planned or scheduled future action, just like English does.

So:

• demà anem a nedar = tomorrow we’re going swimming

This is very natural.

You could also say:

• demà anirem a nedar

That is also correct, but it sounds more explicitly future. The version with anem often feels a bit more immediate or arranged.

So both are possible:

• demà anem a nedar = natural for a plan
• demà anirem a nedar = also correct, more clearly future

Because after anar in this kind of sentence, Catalan uses a + infinitive.

• anar a nedar = to go swimming
• literally: to go to swim

So:

• demà anem a nedar = tomorrow we’re going swimming

This is the normal Catalan structure after a verb of movement like anar when it is followed by another action.

Other examples:

• Vaig a comprar pa. = I’m going to buy bread.
• Anem a menjar. = We’re going to eat.

Yes, Catalan has some flexibility in word order, especially with time expressions like ara and demà.

The original sentence is very natural:

• Ara estic preparant la motxilla i la tovallola perquè demà anem a nedar.

But other arrangements are also possible, depending on emphasis. For example:

• Demà anem a nedar, així que ara estic preparant la motxilla i la tovallola.
• Ara preparo la motxilla i la tovallola perquè demà anem a nedar.

The original version works well because it starts with what is happening now, then explains why.

Not in this sentence, if you want the same meaning.

• anem a nedar = we are going swimming
• nedem = we swim / we are swimming

These are not quite the same.

Here the idea is that tomorrow you will go somewhere in order to swim, so anem a nedar is the right expression.

If you said:

• perquè demà nedem

that would mean something closer to because tomorrow we swim / we’ll be swimming, which is possible in some contexts, but it does not express the idea of going swimming as clearly.