La lona tapa la tenda de campanya.

Because both lona and tenda are feminine singular nouns, so they take the feminine singular definite article la.

• la lona = the canvas / the tarp
• la tenda de campanya = the tent

Catalan articles have to agree with the noun in gender and number.

Yes. Tapa is the third-person singular present form of the verb tapar, meaning to cover or to block/close up.

So:

• tapar = to cover
• tapa = covers / is covering

In this sentence, la lona is the subject, so the verb must be singular:

• La lona tapa... = The canvas covers...

Because Catalan, like English, needs a conjugated verb in a normal sentence.

• tapar is the infinitive: to cover
• tapa is the form that matches he/she/it

So La lona tapa la tenda de campanya is correct because it means:

• The canvas covers the tent

If you used tapar, it would be like saying The canvas to cover the tent, which is not a complete sentence.

Lona usually means canvas, tarpaulin, or a heavy protective sheet of fabric/material.

The exact English word depends on context:

• canvas if you are thinking of the material
• tarpaulin / tarp if it is being used as a protective cover

So in this sentence, lona is something being used to cover the tent.

Tenda de campanya is the standard full expression for tent.

Literally, it is:

• tenda = tent
• de campanya = of campaign / for field use

As a whole, it simply means camping tent or tent.

Sometimes, if the context is already clear, a speaker might shorten it to tenda, but tenda de campanya is the safer and more standard form for learners.

Literally, de campanya means of campaign. Historically, it refers to something used in the field, especially in military or outdoor settings.

In modern Catalan, tenda de campanya is just a fixed expression meaning tent. You do not need to interpret it word by word every time.

So even though campanya often means campaign, in this phrase the full expression has a specific meaning.

Yes, the basic order here is very similar to English:

• La lona = subject
• tapa = verb
• la tenda de campanya = object

So it follows a normal subject–verb–object pattern:

• La lona tapa la tenda de campanya
• The canvas covers the tent

That makes this sentence quite straightforward for an English speaker.

Yes, you often could, but there is a slight nuance.

• tapar often suggests covering over, blocking, or putting something on top of something
• cobrir means to cover in a broader, more general sense

So:

• La lona tapa la tenda de campanya suggests the tarp is covering it over
• La lona cobreix la tenda de campanya also works, but sounds a bit more neutral or general

Both can be correct depending on context.

Yes, both are feminine nouns in Catalan.

That is why you get:

• la lona
• la tenda

And if they were plural:

• les lones
• les tendes de campanya

Their gender is a property of the noun, so you need to remember it when using articles and adjectives.

Then you would normally use the indefinite articles una and una:

• Una lona tapa una tenda de campanya

Compare:

• La lona tapa la tenda de campanya = the canvas covers the tent
• Una lona tapa una tenda de campanya = a canvas covers a tent

So the original sentence is talking about specific things, while the version with una is more indefinite.

A simple learner-friendly pronunciation is:

la LO-na TA-pa la TEN-da de kam-PA-nya

A few helpful points:

• ny in campanya sounds like the ny in canyon
• e in tenda is an open e sound in many accents
• in many Eastern varieties of Catalan, the final a is pronounced more like a neutral uh sound

So campanya sounds roughly like kam-PA-nya.