Ons verander die maalgraad vir die koffiegronde.

In Afrikaans, present-tense verbs usually do not change form for different subjects.

So you get:

• ek verander = I change
• jy verander = you change
• ons verander = we change
• hulle verander = they change

That is much simpler than English, where you have change but also changes.

Die means the, and Afrikaans uses it before each definite noun phrase.

In this sentence, there are two definite noun phrases:

• die maalgraad
• die koffiegronde

So each one gets its own die.

Also, unlike English, Afrikaans uses die for both singular and plural:

• die boek = the book
• die boeke = the books

Maalgraad is a compound noun, made from:

• maal = grind / milling
• graad = degree / grade

So maalgraad literally means something like grinding degree, and in natural English it is often rendered as grind size, grind setting, or coarseness depending on context.

Afrikaans makes a lot of compound nouns like this, and they are usually written as one word.

Here vir means for.

It links die maalgraad to the thing it applies to:

• die maalgraad vir die koffiegronde = the grind setting/grade for the coffee grounds

So vir die koffiegronde tells you what the grind setting is intended for or connected to.

This is just the ordinary prepositional use of vir.

Yes. Koffiegronde is plural and means coffee grounds.

That is one reason the English translation often sounds natural with the plural grounds rather than something singular.

A useful thing to notice is that the article does not change in Afrikaans:

• die koffiegrond = the coffee ground
• die koffiegronde = the coffee grounds

Afrikaans strongly prefers writing compound nouns as one word.

So:

• maal + graad → maalgraad
• koffie + gronde → koffiegronde

This is very common in Afrikaans and can feel unusual to English speakers, because English often writes similar expressions as separate words, such as coffee grounds or grind size.

Yes, it is a very normal main-clause word order.

The structure is:

• Ons = subject
• verander = verb
• die maalgraad = direct object
• vir die koffiegronde = prepositional phrase

So the pattern is basically:

Subject + Verb + Object + Prepositional phrase

That is a standard Afrikaans sentence pattern.

Also, Afrikaans main clauses usually keep the finite verb in the second position. Since Ons comes first, verander comes immediately after it.

It can often mean either, depending on context.

Afrikaans simple present is broader than English present simple. It can be used for:

• a general action: We change
• an action happening now: We are changing

Usually the context tells you which meaning is intended.

If Afrikaans wants to emphasize an action in progress, it can use other constructions, such as besig om te, but the simple form Ons verander is completely normal.

The usual past tense would be:

Ons het die maalgraad vir die koffiegronde verander.

Afrikaans commonly forms the past tense with:

• het
  • past participle

So here:

• verander → verander as the participle form
• Ons het ... verander = We changed / We have changed

That is a very common Afrikaans pattern.