Ek gaan die sein en dekking na.

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

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

• Ek gaan die sein en dekking na.

So gaan ... na here is not two unrelated words. Together they make the single verb nagaan.

No. In this sentence, gaan ... na is the present-tense form of nagaan.

That means the sentence is using one main verb, not a future construction.

Compare these:

• Ek gaan die sein en dekking na. = I check / I am checking the signal and coverage.
• Ek gaan die sein en dekking nagaan. = I am going to check the signal and coverage.

So the position of na helps you see which meaning is intended.

The dictionary form is nagaan.

That is the form you would normally look up in a dictionary. In this sentence, it appears split as:

• gaan ... na

This is very common with separable verbs in Afrikaans.

Because one die can cover both nouns when they are joined by en.

So:

• die sein en dekking

means the signal and coverage.

You can also repeat the article if you want:

• die sein en die dekking

Both are possible, but using die only once is perfectly normal.

No. Afrikaans does not have different forms of the for masculine, feminine, and neuter nouns.

die is used very widely, including here with both sein and dekking. This is much simpler than in languages like German or Dutch.

Because Afrikaans verbs usually do not change according to the subject in the present tense.

So you get:

• ek gaan
• jy gaan
• hy gaan
• ons gaan

This is one of the things that makes Afrikaans grammar simpler for English speakers.

Afrikaans main clauses normally follow a verb-second pattern.

In this sentence:

• Ek = first element
• gaan = finite verb in second position
• die sein en dekking = object
• na = separated particle at the end

So the structure is very typical for a main clause with a separable verb.

Afrikaans usually uses het plus a past participle for the past tense:

• Ek het die sein en dekking nagegaan.

Notice that in the participle, the verb is written together again as nagegaan.

So:

• present: Ek gaan die sein en dekking na.
• past: Ek het die sein en dekking nagegaan.

Then the verb usually appears in its full, unsplit form nagaan.

For example:

• Ek wil die sein en dekking nagaan. = I want to check the signal and coverage.
• Ek gaan die sein en dekking nagaan. = I am going to check the signal and coverage.

So when nagaan is not the finite verb of the clause, it usually stays together.

In a subordinate clause, the verb usually goes to the end, and the separable verb is normally written together:

• Ek weet dat ek die sein en dekking nagaan.

So unlike the main clause Ek gaan ... na, a subordinate clause often uses the unsplit form nagaan at the end. This is another very common pattern in Afrikaans.