Nechci mít koberec u dveří; bude lepší uprostřed pokoje pod stolem.

Because Czech, like English, often uses a conjugated verb + infinitive pattern.

• Nechci = I don’t want
• mít = to have

So Nechci mít koberec... means literally I don’t want to have a carpet/rug...

This is very similar to English I don’t want to have... / I don’t want to keep...

The first verb (nechci) is conjugated for the subject I, and the second verb (mít) stays in the infinitive.

Nechci is the 1st person singular form of chtít (to want) with negation.

• chci = I want
• nechci = I don’t want

The negative prefix ne- is attached directly to the verb.

Examples:

• Chci jít. = I want to go.
• Nechci jít. = I don’t want to go.

So in your sentence:

• Nechci mít koberec... = I don’t want to have the carpet...

Because koberec is a masculine inanimate noun, and in the singular, its nominative and accusative forms are often the same.

Here, koberec is the direct object of mít, so it is in the accusative:

• mít co? = to have what?
• koberec

But the form happens to look the same as the dictionary form.

So:

• koberec can be nominative: Koberec je nový. = The carpet is new.
• koberec can also be accusative: Mám koberec. = I have a carpet.

U usually takes the genitive case when it means by, near, at.

So:

• u
  • genitive

The noun dveře (door) is one of those Czech nouns that normally exists only in the plural form, even when English uses singular door.

Its genitive plural is:

• dveří

So:

• u dveří = by the door / near the door

This is very common:

• stojím u dveří = I’m standing by the door
• boty jsou u dveří = the shoes are by the door

Because dveře is a plural-only noun in Czech (called pluralia tantum).

That means Czech treats door as a plural-form noun:

• nominative: dveře
• genitive: dveří
• locative: dveřích, etc.

Even when English would say the door, Czech still says dveře.

This is just something learners need to get used to. Other Czech nouns work this way too.

So:

• u dveří does not mean by the doors in the English plural sense; it usually just means by the door.

Bude lepší literally means will be better.

Czech often leaves the subject unstated when it is obvious from context. Here, the understood subject is something like:

• to = it
• or more specifically the carpet’s placement

So the idea is:

• (To) bude lepší uprostřed pokoje pod stolem.
• It will be better in the middle of the room under the table.

In natural English, we might say:

• It would be better in the middle of the room under the table. or
• It’ll be better there...

Czech commonly omits this kind of pronoun when the meaning is clear.

Because bude is the future tense of být (to be).

• je lepší = is better
• bude lepší = will be better

Here the speaker is making a judgment about placement, something like:

• It will be better in the middle of the room...

This can sound a bit like a decision or recommendation about where the carpet should go.

In context, English might also translate it less literally as:

• It would be better... even though the Czech form is literally future.

Lepší is the comparative form of dobrý (good).

• dobrý = good
• lepší = better

So:

• To je dobré. = That is good.
• To je lepší. = That is better.

In your sentence:

• bude lepší = will be better

It is being used predicatively, after být (to be).

Uprostřed means in the middle of / in the center of, and it is followed by the genitive.

So:

• uprostřed
  • genitive

The noun pokoj (room) becomes:

• nominative: pokoj
• genitive singular: pokoje

Therefore:

• uprostřed pokoje = in the middle of the room

This is similar to:

• uprostřed města = in the middle of the city
• uprostřed noci = in the middle of the night

Because Czech uses different cases after many prepositions depending on whether you mean location or movement.

With pod (under):

• pod + instrumental = location (under, already there)
• pod + accusative = movement toward under (to under, putting something there)

In your sentence, the carpet would be located under the table, so Czech uses the instrumental:

• pod stolem = under the table

Compare:

• Koberec je pod stolem. = The carpet is under the table.
• Dám koberec pod stůl. = I’ll put the carpet under the table.

That location-vs-movement distinction is very important in Czech.

Because after pod in a location meaning, Czech requires the instrumental case.

The noun stůl (table) changes like this:

• nominative: stůl
• instrumental singular: stolem

So:

• pod stolem = under the table

This is a normal case ending for a masculine inanimate noun in this pattern.

Yes, Czech word order is fairly flexible, but this version is natural and clear.

The phrase builds from broader location to more specific location:

• uprostřed pokoje = in the middle of the room
• pod stolem = under the table

So the carpet’s preferred place is:

1. in the middle of the room
2. specifically under the table

Other orders are possible, for example:

• pod stolem uprostřed pokoje

That is also understandable, but it may shift emphasis slightly. The original order sounds smooth and neutral.

Because Czech often omits words that are obvious from context.

In English, we usually need:

• it will be better or
• the carpet will be better there

In Czech, once koberec has already been mentioned, the speaker can simply say:

• bude lepší...

The listener naturally understands that this refers to the carpet’s placement.

A fuller version could be:

• Koberec bude lepší uprostřed pokoje pod stolem. or
• Ten koberec bude lepší uprostřed pokoje pod stolem.

But the shorter original sentence is very normal.

The semicolon links two closely related clauses:

• Nechci mít koberec u dveří
• bude lepší uprostřed pokoje pod stolem

It shows a pause stronger than a comma but not as final as a period.

In English, this feels like:

• I don’t want the carpet by the door; it’ll be better in the middle of the room under the table.

A period would also work:

• Nechci mít koberec u dveří. Bude lepší uprostřed pokoje pod stolem.

The semicolon just highlights that the second clause explains or contrasts with the first.

In this context, it means more like to have the carpet positioned by the door.

Czech mít often means not just possession, but also having something somewhere:

• Mám klíče v tašce. = I have my keys in my bag.
• Máme stůl v kuchyni. = We have a table in the kitchen.

So:

• Nechci mít koberec u dveří is not mainly about owning a carpet.
• It is about where the carpet is kept/placed.

That is why the second clause talks about a better location for it.