Die kontrolepunt is by die museum.

Because die is the Afrikaans definite article, meaning the.

In this sentence:

• Die kontrolepunt = the checkpoint
• die museum = the museum

Afrikaans uses die for definite nouns regardless of grammatical gender, so you do not have to learn different forms like the masculine/feminine/neuter.

Yes. This sentence follows a very familiar pattern:

• Die kontrolepunt = subject
• is = verb
• by die museum = location phrase

So it works like:

• The checkpoint
  • is
    • by the museum

That makes this sentence very straightforward for English speakers.

Here, by means at, by, or near a place.

So by die museum means:

• at the museum
• by the museum
• near the museum

It does not necessarily mean inside the museum.

If you wanted to say in the museum, you would normally say:

• in die museum

So:

• by die museum = at/near the museum
• in die museum = inside the museum

Yes. Kontrolepunt is a compound noun, just like many nouns in Afrikaans.

It is made from:

• kontrole = control/check
• punt = point

Together, kontrolepunt means checkpoint.

Afrikaans often forms compounds by joining words into one word, much more often than English does.

Other similar examples are:

• busstop = bus stop
• polisiestasie = police station

So if you see a long noun in Afrikaans, it is often helpful to look for smaller parts inside it.

In Afrikaans, verbs are much simpler than in English. The verb is stays the same with different subjects in the present tense.

For example:

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

So unlike English, you do not need to memorize forms like am / is / are. Afrikaans keeps is.

In Afrikaans, die is pronounced roughly like dee.

That is very important, because an English speaker may want to pronounce it like the English word die, but that would be wrong here.

So:

• Afrikaans die = roughly dee
• not English die

By is pronounced roughly like bay, though the exact Afrikaans vowel is a little different from standard English.

For a beginner, bay is a good approximation.

So:

• by die museum ≈ bay dee museum

Because common nouns in Afrikaans are not capitalized.

Unlike German, Afrikaans does not capitalize all nouns.

So:

• museum stays lowercase
• kontrolepunt stays lowercase

Only the first word of the sentence and proper names are capitalized:

• Die kontrolepunt is by die museum.
• Die kontrolepunt is by die Iziko Museum.

Usually no, not in this sentence.

If you are talking about a specific museum, Afrikaans normally needs the article:

• by die museum = at the museum

Leaving it out would usually sound incomplete or unnatural here.

You would usually move the verb to the front:

• Is die kontrolepunt by die museum?

That means:

• Is the checkpoint by the museum?

This is very similar to English question formation with is.

Afrikaans usually uses a double nie for negation.

So the negative version is:

• Die kontrolepunt is nie by die museum nie.

This means:

• The checkpoint is not by the museum.

A useful pattern is:

• Subject + verb + nie + rest + nie

That double negative pattern is one of the most important things to get used to in Afrikaans.

It can mean either, depending on context.

By die museum is fairly broad. It can mean:

• at the museum
• by the museum
• near the museum

If you need to be more precise, Afrikaans can use other expressions, for example:

• langs die museum = next to the museum
• voor die museum = in front of the museum
• in die museum = in the museum

So by is a general location word here, not a very exact one.