Des que ha començat el novembre, sempre porto un paraigua quan agafo el tren.

Des que means since when it is followed by a full clause with a verb.

• Des que ha començat el novembre = Since November started
• Here, ha començat is a conjugated verb, so des que is the right choice.

By contrast, des de is used before a noun, a date, or a time expression, not before a full clause:

• des del novembre passat = since last November
• des de dilluns = since Monday

So a useful rule is:

• des que + verb
• des de + noun/time expression

Ha començat is the present perfect in Catalan. It is very commonly used to talk about a past event that still matters in the present.

In this sentence, the idea is:

• November started in the past
• the situation continues now

So des que ha començat el novembre fits very naturally.

In many varieties of Catalan, especially in everyday language, the present perfect is often preferred where English might simply say started.

Because the action is presented as a current habit.

The sentence means that from the moment November began up to now, this is something the speaker regularly does:

• sempre porto un paraigua = I always carry an umbrella
• quan agafo el tren = when I take the train

Catalan often uses the present tense for habitual actions that are still true now, even when the sentence begins with a since expression.

So the structure is:

• starting point in the past: Des que ha començat el novembre
• ongoing present habit: sempre porto... quan agafo...

Catalan often uses the definite article with months:

• el novembre
• l’abril
• el gener

So ha començat el novembre is normal Catalan.

English usually says just November, but Catalan more often includes the article in many contexts.

Porto is the first-person singular of portar.

Here it means I carry.

But portar is a very flexible verb in Catalan. Depending on context, it can mean:

• to carry
• to bring
• to wear

In this sentence, porto un paraigua clearly means I carry an umbrella.

Yes, in some contexts and dialects, dur can also mean to carry or to bring, and duc is its first-person singular form.

However, portar is extremely common and very natural here:

• porto un paraigua

For a learner, portar is the safest and most widely useful choice in sentences like this.

Un paraigua means an umbrella, so it sounds general or nonspecific.

The idea is not necessarily one particular umbrella, but simply the habit of carrying one.

If you said el paraigua, it would usually suggest a specific umbrella already known from context:

• Sempre porto el paraigua = I always carry the umbrella / my umbrella in a more specific sense

So un paraigua is the most natural choice for a general habit.

Agafar el tren means to take the train or to catch the train.

The verb agafar literally means to take or to grab, but in transport contexts it is very commonly used for taking a bus, train, etc.

Examples:

• agafo el tren = I take the train
• agafem l’autobús = we take the bus

So this is a very useful everyday expression.

Because quan here introduces a clause with a conjugated verb:

• quan agafo el tren = when I take the train

Catalan, like English, normally uses a finite verb after when in this kind of sentence.

An infinitive like quan agafar el tren would not work here.

Sempre usually goes before the main verb:

• sempre porto
• sempre agafo

That is the most neutral placement.

In this sentence:

• Des que ha començat el novembre, sempre porto un paraigua...

this sounds very natural.

Catalan word order can be somewhat flexible, but for learners, putting sempre before the verb is a very good default pattern.

It describes a general routine or habit.

The combination of:

• des que... = from a starting point until now
• sempre = always
• present tense verbs = ongoing habit

gives the sense of repeated behavior:

• ever since November started, this has been the speaker’s normal routine

So it is not about one single occasion.

Yes. In fact, that is a very good way to feel the nuance.

• Des que = since / ever since
• ha començat el novembre = November started / November has started

So ever since November started is a very natural English gloss for the first part.

Yes.

Catalan normally omits subject pronouns when the verb ending already shows who the subject is:

• porto already means I carry
• agafo already means I take

So you do not need jo.

You could say jo sempre porto un paraigua if you wanted emphasis or contrast, but without emphasis, leaving out the pronoun is the normal choice.

Because Catalan uses the present tense for regular, repeated situations.

• quan agafo el tren does not mean only one future occasion
• it means whenever I take the train

This is very similar to English habits:

• When I take the train, I always bring an umbrella

So the present tense is the normal way to express this kind of repeated condition.

Yes, it is natural and grammatically correct.

It has a very common structure:

• Des que... for a starting point in the past
• present perfect in the subordinate clause
• present tense for an ongoing habit
• sempre for frequency
• quan + present for repeated situations

So it sounds like normal everyday Catalan.