La moquette est plus douce que le carrelage, mais je préfère poser mes chaussures près du tabouret.

Because moquette is a feminine singular noun, and the adjective doux / douce has to agree with it.

• doux = masculine singular
• douce = feminine singular
• doux = masculine plural
• douces = feminine plural

So:

• Le tapis est plus doux...
• La moquette est plus douce...

That final -e in douce shows feminine agreement.

Plus ... que is the standard way to make a comparison meaning more ... than.

Pattern:

A est plus + adjective + que + B

So in your sentence:

• La moquette est plus douce que le carrelage.

This is the same structure as:

• Le café est plus chaud que le thé.
• Marie est plus grande que Paul.

A useful comparison set:

• plus ... que = more ... than
• moins ... que = less ... than
• aussi ... que = as ... as

In French, nouns usually need an article much more often than in English. So carrelage normally appears with le here.

• le carrelage = tile flooring / the tiled floor
• la moquette = carpeting / the carpet

Even when English might sound more general, French often still uses the definite article:

• J’aime le chocolat.
• Le tennis est difficile.
• La moquette est plus douce que le carrelage.

So que le carrelage is the natural French form.

Here, carrelage refers to a tiled floor surface or tiling.

It is not just one tile. It means the flooring material or tiled area in general.

Compare:

• un carreau = a tile
• le carrelage = tile flooring / tiling

So in this sentence, la moquette is being compared with le carrelage as two kinds of floor surfaces.

Because after préférer, French often uses an infinitive when you say you prefer to do something.

Pattern:

préférer + infinitive

So:

• Je préfère poser mes chaussures... = I prefer to place/set down my shoes...
• Je préfère attendre.
• Je préfère partir tôt.

This is very common in French. It works much like English prefer to + verb, except French often simply uses the infinitive directly without to as a separate word.

Poser often means to put down, to place, or to set something somewhere, especially with the idea of putting it in a position.

So poser mes chaussures près du tabouret suggests placing or setting the shoes down near the stool.

French has several verbs that can translate English put:

• mettre = put, put on, place
• poser = put down, set down, place
• placer = place, position
• déposer = leave, set down, deposit

Here, poser sounds natural because shoes are being set down somewhere.

Because chaussures means shoes, and people normally wear or place a pair, so the plural is natural.

Also, French uses a possessive adjective that agrees with the noun, not with the owner:

• mon / ma / mes = my

Since chaussures is plural, you use mes:

• mes chaussures
• mes livres
• mes clés

Even though the speaker is just one person, the noun is plural, so the possessive must be mes.

Because de + le contracts to du in French.

So:

• près de le tabouret → près du tabouret

This contraction happens very often:

• de + le = du
• de + les = des

Examples:

• à côté du lit
• près du mur
• le toit des maisons

But there is no contraction with feminine singular:

• près de la porte

And none with vowel sound using l’:

• près de l’entrée

Près de means near or close to.

So:

• près du tabouret = near the stool

It is similar to à côté de, but not exactly the same.

• près de = near, close to
• à côté de = next to, beside

Examples:

• Les chaussures sont près du tabouret.
  The shoes are somewhere near it.

• Les chaussures sont à côté du tabouret.
  The shoes are right beside it.

So près de is a bit less exact.

Mais means but, and it links two contrasting ideas:

• La moquette est plus douce que le carrelage
• je préfère poser mes chaussures près du tabouret

So the speaker is saying something like:

• carpeting is softer than tile,
• but despite that, they prefer to put their shoes near the stool.

This is normal French word order. Mais commonly joins two clauses just like but does in English.

Examples:

• Il est fatigué, mais il travaille.
• J’aime ce café, mais il est cher.

They involve two different grammar situations.

• le carrelage is the definite article directly with the noun.
• du tabouret comes from de + le tabouret after the expression près de.

So:

• que le carrelage
  Here, le belongs to the noun phrase itself.

• près du tabouret
  Here, du is not a basic article by itself in the same way; it is the contraction of de + le.

This is a very common point for learners, because du can also mean some in other contexts, but here it specifically means of the / near the because of the contraction.

In this sentence, plus in plus douce que is usually pronounced [plys], with the s sound heard, because it expresses a comparison.

So:

• plus douce → roughly plys doos

This is different from some other uses of plus, where the final s may be silent.

A useful rule of thumb:

• In comparisons like plus grand, plus belle, plus douce, learners will often hear the s.

French pronunciation of plus can vary depending on context and speech style, but in a sentence like this, pronouncing the s is the safest choice for learners.

Not exactly. They are related, but they do not mean the same thing.

• la moquette = fitted carpet / wall-to-wall carpeting
• le tapis = rug / carpet, usually a movable one

So if you are talking about the floor covering of a whole room, moquette is often the better word. If you mean a rug that can be picked up and moved, tapis is better.

That is why la moquette makes sense when comparing it with le carrelage, since both refer to general floor surfaces.