Die deurkosyn is langs die muur.

Because die is the definite article the in Afrikaans.

It appears before both nouns:

• die deurkosyn = the door frame
• die muur = the wall

Unlike English, Afrikaans does not change the article for gender, and it does not have separate words like the vs. something gendered. So die is very common and can be used with singular and plural nouns.

No. Afrikaans does not use grammatical gender the way languages like German or Dutch do.

That means:

• you do not need to memorize nouns as masculine/feminine/neuter
• the article stays simple: die for the

So in this sentence, die deurkosyn and die muur both use die, regardless of the type of noun.

Yes, deurkosyn is one word because Afrikaans often writes compound nouns as a single word.

Here:

• deur = door
• kosyn = frame / jamb
• deurkosyn = door frame

This is very normal in Afrikaans. English often writes similar ideas as two words, but Afrikaans usually joins them:

• huisdeur = front/house door
• vensterraam = window frame
• boekrak = bookshelf

So deurkosyn as one word is exactly what you would expect in Afrikaans.

Kosyn refers to a frame around an opening, especially a door or window. In deurkosyn, it means the door frame or door jamb.

So:

• kosyn = frame/jamb
• deurkosyn = door frame
• vensterkosyn = window frame

A learner may not often see kosyn by itself at first, but it appears naturally inside compounds like this one.

In this sentence, langs means next to, beside, or alongside, depending on context.

So langs die muur means something like:

• next to the wall
• along the wall
• beside the wall

The exact English wording depends on the situation, but the basic idea is location near the side of something.

Because langs already works as the preposition.

In English, learners sometimes expect a pattern like next to the wall, where to is part of the expression. In Afrikaans, langs itself carries that meaning, so you simply say:

• langs die muur

not something extra like langs aan die muur in this sentence.

So the structure is:

• is
  • langs die muur
• is next to the wall

This is the normal word order for a simple statement in Afrikaans:

• Subject: Die deurkosyn
• Verb: is
• Rest of the sentence: langs die muur

So it follows a familiar pattern for English speakers:

• The door frame / is / next to the wall

Afrikaans main clauses usually put the finite verb in the second position, and in a simple sentence like this that gives you:

• subject first
• verb second
• location after that

Mostly yes. Here is is the present-tense form of wees = to be.

In this sentence:

• Die deurkosyn is langs die muur = The door frame is next to the wall

A useful thing to know is that Afrikaans is simpler than English here. The present tense of wees is usually just is for all persons:

• ek is = I am
• jy is = you are
• hy/sy/dit is = he/she/it is
• ons is = we are
• julle is = you are
• hulle is = they are

So you do not need to memorize forms like am / is / are.

You usually make a yes/no question by putting the verb first:

• Is die deurkosyn langs die muur?

That means:

• Is the door frame next to the wall?

So the difference is:

• Statement: Die deurkosyn is langs die muur.
• Question: Is die deurkosyn langs die muur?

This verb-first pattern is very common in Afrikaans.

The plural of deurkosyn is deurkosyne.

So:

• Die deurkosyn is langs die muur. = The door frame is next to the wall.
• Die deurkosyne is langs die muur. = The door frames are next to the wall.

Notice two useful things:

1. die stays die
2. is also stays is

That makes Afrikaans quite straightforward compared with English.

A rough guide is:

• deur sounds somewhat like English dare said with rounded lips, or a vowel somewhat like Dutch deur
• ko is like ko in core but shorter
• syn sounds roughly like sane or sign depending on accent and how narrowly you describe it, but not exactly either

A very rough learner-friendly approximation might be:

• DUR-ko-sayn or DEUR-ko-sayn

But the exact vowels are Afrikaans vowels, so an English approximation will never be perfect.

The most important thing to know is that deurkosyn is stressed naturally as a compound, with clear parts:

• deur
  • kosyn

Muur means wall, and it has a long vowel.

A rough approximation is something like:

• meer with rounded lips or
• myoor said very smoothly

Again, English does not have exactly the same vowel, so the best approach is to listen to native audio if possible. What matters most at first is that it is a long vowel sound and the word is one syllable.

Sometimes yes, but the meaning changes slightly.

• langs die muur = next to / alongside the wall
• by die muur = by / near the wall

So langs is more specific about being along the side of the wall, while by is more general.

If the intended meaning is specifically next to the wall, then langs die muur is the better choice.

Yes, in a normal full sentence like this, Afrikaans needs the verb is.

So you say:

• Die deurkosyn is langs die muur.

Not:

• Die deurkosyn langs die muur.

English works the same way:

• The door frame is next to the wall not
• The door frame next to the wall

So this sentence is a complete clause because it includes the subject and the verb.