Prefereixo te quan fa fred, però aigua quan fa calor.

Prefereixo is the first-person singular present form of preferir, so it means I prefer.

This verb is part of a common Catalan pattern sometimes called incoative, where some present-tense forms use -eix-:

• prefereixo = I prefer
• prefereixes = you prefer
• prefereix = he/she prefers

But:

• preferim = we prefer
• preferiu = you all prefer

So prefereixo is exactly the form you need for I prefer.

In this sentence, te and aigua are being used in a general, substance-like sense, so Catalan can leave out the article.

So the sentence means something like:

• I prefer tea when it’s cold, but water when it’s hot.

You may also hear speakers say el te and l’aigua in similar sentences. Both patterns can appear, but the version here is short and natural.

No. They are different words:

• te = tea
• té = he/she/it has

So the accent matters a lot here. In your sentence, te has no accent because it means tea.

Quan means when.

It introduces a time clause:

• quan fa fred = when it’s cold
• quan fa calor = when it’s hot

So it connects the preference to a situation or time.

For weather and ambient temperature, Catalan commonly uses fer.

So:

• fa fred = it’s cold
• fa calor = it’s hot

Literally, this is closer to it makes cold/heat, but you should learn these as fixed everyday expressions.

Because for weather or general temperature, Catalan normally uses fa, not és.

So:

• fa fred is correct for the weather is cold
• fa calor is correct for the weather is hot

Using és fred here would not sound natural for talking about the weather.

No. In this sentence, fa fred refers to the weather or the surrounding temperature, not the drink itself.

So the meaning is:

• when the weather is cold, I prefer tea

If you wanted to say that the tea itself is cold, Catalan would usually use està fred or és fred, depending on the context.

Because Catalan often leaves out repeated words when they are already understood.

The full version would be:

Prefereixo te quan fa fred, però prefereixo aigua quan fa calor.

But repeating prefereixo is not necessary, because the meaning is still perfectly clear. This kind of omission is very common and natural.

Però means but, and it is written with a grave accent: ò.

That accent is part of the correct spelling. It also helps show the stressed vowel sound. So in standard Catalan, you should write però, not pero.

Aigua is a feminine noun in Catalan.

If you use the definite article, it becomes:

• l’aigua = the water

Because the word begins with a vowel, la becomes l’.

You can also see the feminine gender in agreement:

• aigua freda = cold water

The adjective freda is feminine to match aigua.

Yes. The original sentence is natural, but Catalan allows other word orders too.

For example:

Quan fa fred, prefereixo te, però quan fa calor, aigua.

This means the same thing. The original version puts the drinks first, which can sound a bit more direct and compact.