Die monteerstel is immers hier.

Here die is simply the definite article the.

A few useful things to know:

• In Afrikaans, die is used for both singular and plural nouns.
  • die monteerstel = the assembly kit / mounting kit
  • die monteerstelle = the assembly kits
• It is not related to the English verb to die.
• It is normally written in lowercase unless it begins the sentence, as it does here.

Afrikaans very often forms compound nouns by writing them as one word.

So monteerstel is a compound noun, made from parts that together mean something like:

• monteer = assemble / mount / install
• stel = set / kit

Together, monteerstel means something like assembly kit, mounting kit, or installation kit, depending on context.

This is very normal in Afrikaans. English often writes similar ideas as two words, but Afrikaans usually prefers one compound word.

Afrikaans main clauses usually follow a verb-second pattern.

That means:

• the first slot is taken by one element of the sentence
• the finite verb usually comes second

In this sentence:

• Die monteerstel = first element
• is = second element

So the structure is:

• Die monteerstel | is | immers | hier

This is very normal Afrikaans word order for a statement.

Immers is a discourse word that adds a nuance like:

• after all
• as you know
• you see
• obviously / indeed in some contexts

It usually points to something that the speaker sees as already known, already established, or worth reminding the listener of.

So Die monteerstel is immers hier is not just saying The assembly kit is here. It suggests something more like:

• The assembly kit is here, after all.
• The assembly kit is here, you know.
• After all, the assembly kit is here.

The exact best English rendering depends on context.

Yes. You can say:

• Die monteerstel is hier.

That would be a more neutral, plain statement: The assembly kit is here.

Adding immers gives extra attitude or context. It can sound like the speaker is:

• reminding someone
• justifying something
• pointing out that the fact should already matter or be known

So:

• Die monteerstel is hier. = neutral
• Die monteerstel is immers hier. = The assembly kit is here, after all / you know

In a sentence like this, immers usually appears in the middle field of the clause, after the finite verb and before the final adverb or complement.

So:

• Die monteerstel is immers hier.

is the natural order.

Here, hier gives the location, and immers comments on the whole statement.

If you move words around, the sentence may still be possible in some contexts, but the emphasis changes and it may sound more marked or less natural. For a learner, the safest pattern is:

• subject + is + immers + hier

Hier means here.

In simple Afrikaans statements, words giving location often come toward the end of the sentence, so:

• Die monteerstel is hier.
• Die monteerstel is immers hier.

That is very natural.

You can sometimes move hier to the front for emphasis:

• Hier is die monteerstel.

That puts stronger focus on the location, almost like Here is the assembly kit or The assembly kit is here with emphasis on here.

Afrikaans is does not change the way English am / is / are does.

For the present tense of to be, Afrikaans uses is with all persons and numbers:

• Ek is = I am
• Jy is = you are
• Hy is = he is
• Ons is = we are
• Hulle is = they are

So even if the noun were plural, Afrikaans would still use is:

• Die monteerstelle is hier. = The assembly kits are here.

This is one of the ways Afrikaans grammar is simpler than English.

For a yes/no question, Afrikaans usually puts the finite verb first:

• Is die monteerstel immers hier?

That is grammatically fine, but in real usage many speakers might simply say:

• Is die monteerstel hier?

because immers often sounds more natural in statements than in straightforward questions.

So the basic pattern is:

• statement: Die monteerstel is hier.
• question: Is die monteerstel hier?