Fasiliteitsbestuurders gaan na of toegangspasse werk al dan nie.

Because nagaan is a separable verb in Afrikaans.

Its basic dictionary form is nagaan, meaning to check, to verify, or to inspect. But in a finite main clause, it often splits:

• Hulle gaan die passe na. = They check the passes.
• Hulle gaan na of die passe werk. = They check whether the passes work.

So in your sentence, gaan and na still belong together as one verb idea: nagaan.

No, not by itself.

Even though gaan often means go, here it is part of the separable verb nagaan. So the sentence is not about physically going anywhere, and it is not a future tense either.

Here, gaan na means check / verify.

Here of means whether.

Afrikaans of can mean either:

• whether
• or

In this sentence, it introduces an indirect yes/no question:

of toegangspasse werk al dan nie
= whether access passes work or not

So this is the whether meaning, not the or meaning.

al dan nie is a fixed expression meaning or not.

So:

• of toegangspasse werk = whether access passes work
• of toegangspasse werk al dan nie = whether access passes work or not

It makes the idea more explicit. You are best off learning al dan nie as a set phrase.

Because of introduces a subordinate clause, and al dan nie is a fixed ending attached to that idea.

The pattern here is basically:

of + subject + verb + al dan nie

So:

• of = whether
• toegangspasse = access passes
• werk = work / function
• al dan nie = or not

That gives: whether access passes work or not.

Here werk means work, function, or operate properly.

It does not mean have a job in this sentence. Afrikaans uses werk for machines, systems, cards, keys, and similar things that function or fail to function.

For example:

• Die sleutel werk nie. = The key doesn’t work.
• Die stelsel werk goed. = The system works well.

So toegangspasse werk means access passes work / function.

toegangspasse is plural.

• Singular: toegangspas = access pass
• Plural: toegangspasse = access passes

It is a compound noun:

• toegang = access
• pas = pass

Together: toegangspas = access pass

Depending on context, this could mean a pass, badge, or access card.

Because Afrikaans, like English, can use a bare plural when speaking generally.

So toegangspasse can mean access passes in general, without saying the.

If you wanted to refer to specific passes, you could say:

• die toegangspasse = the access passes

So the sentence as written sounds like a general statement about access passes, not necessarily one particular set.

Because Afrikaans forms compound nouns very readily, and they are usually written as one word.

Here:

• fasiliteit = facility
• bestuurder = manager

Together they form fasiliteitsbestuurder = facility manager

Then the plural is:

• fasiliteitsbestuurders = facility managers

The -s- in the middle is a linking sound that often appears in compounds.

It is in the present tense.

So it can mean something like:

• Facility managers check whether access passes work or not
• Facility managers are checking whether access passes work or not

The exact English translation depends on context, but the Afrikaans form itself is present tense.