Faig dues repeticions.

Faig is the 1st person singular present indicative form of fer.

So it is the form used with I:

• jo faig
• tu fas
• ell/ella fa

In this sentence, faig tells you the subject is I, even though jo is not written.

Yes. Fer is irregular, and faig is one of the forms you just have to learn.

The present tense is:

• jo faig
• tu fas
• ell/ella fa
• nosaltres fem
• vosaltres feu
• ells/elles fan

This is a very common verb, so it is worth memorizing early.

Because Catalan often drops subject pronouns when the verb form already makes the subject clear.

Since faig already means I do / I make, jo is not necessary.

You can still say Jo faig dues repeticions, but that usually adds:

• emphasis
• contrast
• clarity in conversation

For example:

• Jo faig dues repeticions, però ell en fa tres.

Because repetició is a feminine noun, and the number two agrees in gender in Catalan:

• dos = masculine
• dues = feminine

So:

• dos llibres
• dues repeticions

This is one of the first places where learners notice grammatical gender affecting numbers.

It can do both, depending on context.

Faig can mean:

• something you do regularly or habitually
• something you are doing now

Catalan often uses the simple present where English might use either:

• I do
• I am doing

If you need to make the ongoing idea extra clear, Catalan can also use a progressive structure, but the simple present is very common.

The singular is repetició.

So:

• una repetició
• dues repeticions

This is a common noun pattern in Catalan:

• singular -ció
• plural -cions

For example:

• acció / accions
• nació / nacions
• repetició / repeticions

Because when you are simply stating a quantity, Catalan normally uses the number directly:

• dues repeticions
• tres exercicis
• quatre sèries

You would use an article only if you mean something more specific:

• les dues repeticions = the two repetitions

So in your sentence, the noun phrase is just an indefinite quantity, and no article is needed.

Sometimes, but not always.

• dues vegades means twice / two times
• dues repeticions means two repetitions / two reps

Dues repeticions is especially natural in contexts like:

• exercise
• training
• repeated movements
• drills

Dues vegades is more general and refers to the number of times something happens.

So the two expressions are related, but they are not always interchangeable.

Yes, but Faig dues repeticions is the most neutral order.

Other possibilities are possible, but they change the emphasis:

• Jo faig dues repeticions → adds emphasis to I
• Dues repeticions faig → marked, contrastive, or less neutral

For everyday use, the basic sentence order is the safest choice.

Not necessarily. It is very natural when talking about reps or repeated actions, especially in exercise contexts.

In other situations, Catalan might prefer a different structure, for example with:

• vegades
• the verb repetir

So this sentence is perfectly good, but the most natural wording can depend on what exactly is being repeated.