Ek wag by die apteek terwyl sy vir die medisyne betaal.

In Afrikaans, the present tense is usually much simpler than in English. You normally use the basic verb form without an extra am/is/are.

So:

• Ek wag = I wait or I am waiting
• Sy betaal = she pays or she is paying

Afrikaans does not usually need a separate verb like am for this kind of sentence.

By often means at in Afrikaans.

So by die apteek means at the pharmacy or sometimes near the pharmacy, depending on context. In this sentence, the most natural meaning is at the pharmacy.

Examples:

• Ek is by die huis. = I am at home.
• Ons wag by die deur. = We are waiting at the door.

Yes. Die is the definite article in Afrikaans, and it is used for:

• singular nouns: die apteek = the pharmacy
• plural nouns: die boeke = the books
• many uncountable nouns too: die water = the water

Unlike English, Afrikaans does not change the definite article based on number or gender. It is simply die.

Terwyl means while.

It introduces a clause describing something happening at the same time as the main action.

In your sentence:

• Ek wag by die apteek = I am waiting at the pharmacy
• terwyl sy vir die medisyne betaal = while she pays/is paying for the medicine

So terwyl connects two actions happening simultaneously.

This is a very common question, because Afrikaans word order can be tricky.

After terwyl, you will often see normal clause order:

• sy betaal vir die medisyne

But in your sentence, the phrase vir die medisyne has been placed before the verb:

• sy vir die medisyne betaal

This is also possible in subordinate-clause style word order, especially in more formal or careful Afrikaans.

So learners may encounter both patterns:

• terwyl sy vir die medisyne betaal
• terwyl sy betaal vir die medisyne

The version in your sentence is perfectly understandable and fits the common tendency in Afrikaans for the main verb to move later in subordinate clauses.

Here, vir means for.

The phrase vir die medisyne betaal means pay for the medicine.

This matches English quite closely:

• pay for something
• betaal vir iets

Examples:

• Hy betaal vir die kos. = He pays for the food.
• Ons betaal vir die kaartjies. = We pay for the tickets.

Do not confuse this vir with the other common use of vir meaning for/to before a person:

• Ek gee dit vir hom. = I give it to him.

In this sentence, medisyne most naturally means medicine in a general or mass-noun sense, even though the form may look plural to an English speaker.

Afrikaans often uses medisyne for medicine/medication generally.

So:

• die medisyne = the medicine / the medication

Depending on context, it could also refer to medicines in a broader sense, but in a pharmacy sentence, the medicine/medication is the most natural interpretation.

Afrikaans verbs usually do not change form according to the subject.

So you get:

• Ek wag = I wait
• Jy wag = you wait
• Hy/sy wag = he/she waits
• Ons wag = we wait

And similarly:

• Ek betaal
• Sy betaal
• Hulle betaal

This is much simpler than English, where you have I pay but she pays.

Here, sy means she.

That is because it is the subject of the clause:

• sy ... betaal = she ... pays

Afrikaans can be a little confusing because sy can also be a possessive word meaning his:

• sy boek = his book

But in your sentence, it is clearly the subject pronoun she.

Yes. In many ordinary contexts, the Afrikaans present tense can correspond to either the simple present or the present continuous in English.

So:

• sy betaal can mean she pays
• or she is paying

In this sentence, because it happens together with I am waiting, English would most naturally say while she is paying for the medicine.

In short sentences like this, Afrikaans punctuation is often lighter than English punctuation. A comma before terwyl is often not necessary.

So:

• Ek wag by die apteek terwyl sy vir die medisyne betaal.

is perfectly fine.

In some longer or more complex sentences, writers may use punctuation for clarity, but here the sentence is clear without a comma.

You may sometimes see a comma used, especially if the writer wants to mark a pause, but it is not usually needed here. The version without the comma is more standard for a short, smooth sentence like this.

So the safest learner choice is:

• Ek wag by die apteek terwyl sy vir die medisyne betaal.

The structure is:

• Ek wag by die apteek
  subject + verb + place phrase

• terwyl sy vir die medisyne betaal
  conjunction + subject + object/prepositional phrase + verb

So the full sentence is:

• main clause + terwyl clause

This is a useful pattern for talking about two actions happening at the same time.

Yes, absolutely. This is a very reusable structure.

Examples:

• Ek wag by die dokter terwyl sy met die verpleegster praat.
  I wait at the doctor’s office while she talks to the nurse.

• Ons sit in die motor terwyl hy vir die petrol betaal.
  We sit in the car while he pays for the petrol.

• Ek bly hier terwyl jy die kos bestel.
  I’ll stay here while you order the food.

So the sentence is a good model for building your own Afrikaans sentences.