Ons skryf vir die noodhulpkursus in.

Because the full verb is inskryf, which is a separable verb in Afrikaans.

In a main clause, the finite part goes in the normal verb position, and the particle moves to the end:

• Ons skryf ... in.

But in forms where the verb stays together, it is written as one word:

• om vir die kursus in te skryf
• dat ons vir die kursus inskryf

So the dictionary form is inskryf, but in this sentence it appears split as skryf ... in.

Here inskryf means to register, to enroll, or to sign up.

Even though skryf by itself usually means write, the separable verb inskryf has a different meaning. So:

• skryf = write
• inskryf = enroll / register / sign up

That is very common in Afrikaans: adding a particle like in can create a new meaning.

Because inskryf normally goes with vir when you say what someone is registering for.

So Afrikaans says:

• inskryf vir 'n kursus = register for a course

This is just the standard pattern of the verb. English uses for, and Afrikaans also uses a preposition here, but learners should remember the exact Afrikaans combination:

• vir iets inskryf

It is a compound noun:

• noodhulp = first aid / emergency help
• kursus = course

Together:

• noodhulpkursus = first aid course

Afrikaans very often joins nouns together into one word, where English would often use two or more words.

Other examples:

• taalkursus = language course
• werkswinkel = workshop
• noodnommer = emergency number

Die is the definite article, meaning the.

So:

• die noodhulpkursus = the first aid course
• 'n noodhulpkursus = a first aid course

If the sentence is referring to a specific course already known in context, die is natural.

Afrikaans verbs usually do not change form according to the subject the way English verbs sometimes do.

So you get:

• Ek skryf
• Jy skryf
• Ons skryf
• Hulle skryf

This is much simpler than English verb agreement. In the present tense, the verb usually stays the same.

No. Ons can mean either we or us, depending on its role in the sentence.

In this sentence, it is the subject, so it means we:

• Ons skryf vir die noodhulpkursus in. = We are registering for the first aid course.

As an object, it can mean us:

• Hy help ons. = He helps us.

Yes. Ons skryf vir die noodhulpkursus in is in the present tense.

Depending on context, English might translate it as:

• We register for the first aid course
• We are registering for the first aid course
• We sign up for the first aid course

Afrikaans often uses the simple present where English might prefer either simple present or present continuous.

You may hear variations in spoken language, but the standard and most natural structure is:

• Ons skryf vir die noodhulpkursus in.

With separable verbs, Afrikaans commonly places the object or prepositional phrase between the verb stem and the particle:

• skryf
  • vir die noodhulpkursus
    • in

So for learners, this sentence is the best model to follow.

In the infinitive, the verb stays together as inskryf:

• Ons wil vir die noodhulpkursus inskryf. = We want to register for the first aid course.
• Dit is maklik om vir die noodhulpkursus in te skryf. = It is easy to register for the first aid course.

This is useful because learners often first meet the verb as inskryf, then get confused when they later see skryf ... in in a main clause. Both are the same verb.