Sempre deixo la jaqueta sobre el llit quan arribo a casa.

Sempre means always. Putting it at the beginning is very natural in Catalan and gives the sentence a clear habitual feel: this is something the speaker does regularly.

You could also hear:

• Deixo sempre la jaqueta...
• Quan arribo a casa, sempre deixo la jaqueta...

But Sempre deixo... is a very common and straightforward way to say it.

Because deixo is the conjugated form of the verb deixar.

Here it is in the present tense:

• jo deixo = I leave
• tu deixes = you leave
• ell/ella deixa = he/she leaves

So Sempre deixo... means I always leave...

Here deixar means to leave in the sense of to put something somewhere and leave it there.

So deixo la jaqueta sobre el llit means:

• I leave the jacket on the bed
• or more naturally in English, sometimes I put my jacket on the bed

Catalan deixar can also mean other things in different contexts, such as:

• to let / allow
• to leave behind
• to stop / quit in some expressions

But in this sentence, it clearly means leave/put down.

La jaqueta literally means the jacket.

Catalan often uses the definite article very naturally, even in situations where English might prefer my, your, etc., especially when the owner is obvious from the context.

So depending on the context, la jaqueta may simply mean:

• the jacket
• or naturally in English, my jacket

If you wanted to be extra explicit, you could say:

• la meva jaqueta = my jacket

But that is not always necessary.

Sobre el llit means on the bed or over/on top of the bed.

• sobre = on / over
• el llit = the bed

So:

• sobre el llit = on the bed

This is a good choice if you mean the jacket is placed on top of the bed.

A very common alternative is:

• damunt del llit = on top of the bed

Because al llit usually means in bed or to bed, not on top of the bed.

Compare:

• sobre el llit = on the bed
• al llit = in bed / to bed

So if the jacket is lying on top of the bed, sobre el llit is the better choice.

Because Catalan normally uses an article with nouns in cases like this.

• el llit = the bed

English sometimes leaves out articles in places where Catalan keeps them, but here both languages use one naturally:

• sobre el llit
• on the bed

This part means when I get home.

Breaking it down:

• quan = when
• arribo = I arrive
• a casa = home

So literally it is:

• when I arrive home

In natural English, that often becomes:

• when I get home

Arribo is the first person singular present tense of arribar = to arrive.

So:

• jo arribo = I arrive

In this sentence, it fits because the speaker is talking about their own routine:

• quan arribo a casa = when I arrive home

Because a casa is an idiomatic expression meaning home.

So:

• arribar a casa = to get home / to arrive home

If you say a la casa, that usually refers to a specific house/building, not the general idea of home.

Compare:

• Arribo a casa = I get home
• Arribo a la casa dels meus avis = I arrive at my grandparents’ house

Because the sentence describes a habitual action:

• Sempre deixo... = I always leave...
• quan arribo... = when I arrive... / when I get...

Catalan uses the present tense very naturally for routines and repeated actions, just like English does in sentences such as:

• I always leave my jacket on the bed when I get home

So the grammar matches well here.

Yes. Catalan word order is fairly flexible, although some versions sound more natural in certain contexts.

For example, you could also say:

• Quan arribo a casa, sempre deixo la jaqueta sobre el llit.
• Sempre, quan arribo a casa, deixo la jaqueta sobre el llit.

The original sentence is perfectly natural. It puts the focus first on the repeated habit:

• Sempre deixo...

In deixo, the x is pronounced like sh in English.

So deixo sounds roughly like DAY-shoo in many standard pronunciations.

That is useful because English speakers often expect x to sound like ks, but here it does not.

The ll in Catalan is a special sound. Depending on the variety of Catalan, it may sound:

• like a soft ly sound
• or in some accents more like a y sound

So llit may sound roughly like:

• lyeet
• or closer to yeet, depending on the dialect

The important thing for a learner is that ll is not pronounced like the English l + l separately.

Yes.

• a casa = home
• a casa meva = to my home / to my house

Usually a casa is enough, because it already naturally means home.
You add meva only if you want to be more explicit or contrast it with someone else’s place.

For example:

• Quan arribo a casa, ... = When I get home, ...
• Quan arribo a casa meva, ... = When I get to my place, ...