Die vloer bly skoon deurdat die dekseil dit beskerm.

In Afrikaans, die is the definite article for basically all nouns: singular and plural, and regardless of gender.

So:

• die vloer = the floor
• die dekseil = the tarpaulin / tarp
• die vloere = the floors

This is simpler than languages like German or Dutch, where the article changes more.

Here, bly means remain or stay.

So:

• Die vloer is skoon = The floor is clean
• Die vloer bly skoon = The floor stays/remains clean

A native English speaker may notice that bly can sometimes look unfamiliar because it does not mean happy here. It is a common verb meaning stay/remain.

Because bly is already the main verb.

In this sentence, skoon is a predicate adjective, describing the state of the floor after the verb bly:

• Die vloer bly skoon = The floor stays clean

Just as in English you say stays clean, not stays is clean, Afrikaans also does not add is here.

Deurdat is a conjunction meaning something like:

• because
• through the fact that
• by the fact that

In this sentence, it introduces the reason or mechanism by which the floor stays clean.

So deurdat die dekseil dit beskerm means roughly:

• because the tarpaulin protects it
• through the fact that the tarpaulin protects it

Compared with plain omdat (because), deurdat often puts a bit more focus on how the result happens.

Often, yes.

You could say:

• Die vloer bly skoon omdat die dekseil dit beskerm.

That is a very natural sentence too.

The difference is mainly nuance:

• omdat = a general because
• deurdat = because / by means of the fact that, with more emphasis on the process or means

In everyday speech, omdat is often more common and neutral. Deurdat can sound a bit more formal or explanatory.

Because deurdat introduces a subordinate clause, and in Afrikaans subordinate clauses usually send the finite verb to the end.

Compare:

Main clause:

• Die dekseil beskerm dit.
  • literally: The tarpaulin protects it.

Subordinate clause after deurdat:

• ... deurdat die dekseil dit beskerm
  • literally: ... because the tarpaulin it protects

That verb-final pattern is very normal in Afrikaans after words like:

• omdat = because
• dat = that
• as = if/when
• terwyl = while
• deurdat = because/by the fact that

Dit means it, and here it refers back to die vloer.

So:

• die dekseil dit beskerm = the tarpaulin protects it

It is needed because beskerm is a transitive verb: it normally needs an object, something that is being protected.

You could repeat the noun and say:

• ... deurdat die dekseil die vloer beskerm

But using dit is more natural once die vloer has already been mentioned.

Also, Afrikaans does not assign grammatical gender to nouns the way some European languages do, so using dit for an inanimate thing like vloer is perfectly normal.

Dekseil usually means tarpaulin, tarp, canvas cover, or protective sheet, depending on context.

It is a compound noun:

• dek = cover
• seil = sail / canvas

So the basic idea is a sheet or covering used for protection.

Yes. Skoon is an adjective meaning clean, and here it is used predicatively, after the verb.

• Die vloer is skoon = The floor is clean
• Die vloer bly skoon = The floor stays clean

This is different from using the adjective directly before a noun, as in a clean floor. In this sentence, skoon is not directly attached to the noun; it describes the result or state of the floor.

It is natural and grammatical, but deurdat makes it sound a little more formal or explanatory than the most everyday version.

A more everyday wording might be:

• Die vloer bly skoon omdat die dekseil dit beskerm.

So the original sentence is fine, but a learner should know that omdat is often what you will hear more in casual speech.