La meva mare guarda els llençols nets en un calaix de l'armari.

In standard Catalan, possessives are usually used with the definite article, so la meva mare is the normal way to say my mother.

A few useful points:

• la = the
• meva = my for a feminine singular noun
• mare = mother

So Catalan often uses a structure that looks more like the my mother to an English speaker, even though it simply means my mother.

Guarda is the 3rd person singular present indicative of the verb guardar.

Here it matches la meva mare, which is she / my mother:

• jo guardo = I keep / store
• tu guardes = you keep / store
• ell / ella guarda = he / she keeps / stores

In this sentence, guarda can mean something like:

• keeps
• stores
• puts away

The exact English translation depends on context.

In Catalan, adjectives often come after the noun, especially when they describe a basic quality.

So:

• llençols = sheets
• nets = clean

Together, els llençols nets means the clean sheets.

This noun + adjective order is very common in Catalan, even though English usually puts the adjective first.

Nets agrees with llençols in gender and number.

• llençol is masculine singular
• llençols is masculine plural

So the adjective must also be masculine plural:

• net = clean, masculine singular
• neta = clean, feminine singular
• nets = clean, masculine plural
• netes = clean, feminine plural

Because llençols is masculine plural, Catalan uses nets.

Els is the masculine plural definite article, meaning the.

So:

• el llençol = the sheet
• els llençols = the sheets

Since llençols is plural and masculine, the article must be els.

Here en means in or inside.

So:

• en un calaix = in a drawer

This is a very natural way in Catalan to talk about something being inside a place or container.

Breaking it down:

• en = in
• un = a
• calaix = drawer

De l'armari means of the wardrobe / of the closet.

So:

• un calaix de l'armari = a drawer of the wardrobe
• more naturally in English: a drawer in the wardrobe or a drawer of the closet

The word de often means of, but in English the most natural translation may change depending on context.

Catalan often shortens the article before a word beginning with a vowel or mute h.

So:

• el armari becomes l'armari

This is called elision.

Other examples:

• l'home = the man
• l'escola = the school
• l'amic = the friend

So de l'armari is simply de + el armari, with the article shortened before the vowel.

A helpful approximate pronunciation is:

lyen-SOLS or, in some accents, something closer to yen-SOLS

A few sound notes:

• ll in many Catalan varieties is a sound similar to the lli in English million
• ç is pronounced like s
• the stress falls on the second syllable: llen-ÇOLS

So llençols does not sound like it has a hard k or z sound.

They refer to different pieces or parts of furniture:

• armari = wardrobe, closet, cabinet
• calaix = drawer

So the sentence is talking about putting the sheets inside a drawer that belongs to the wardrobe/closet.

Some parts can move, but the original order is the most neutral and natural.

The sentence is:

La meva mare guarda els llençols nets en un calaix de l'armari.

This follows a very common pattern:

• subject: La meva mare
• verb: guarda
• object: els llençols nets
• place: en un calaix de l'armari

Catalan does allow flexibility for emphasis, but for a learner this word order is an excellent basic model.