Sy nies die hele oggend, en haar keel voel seer.

Here, Sy means she.

Afrikaans sy can be confusing because it can also mean his in other sentences, but in this sentence it is clearly the subject pronoun she because it comes before the verb nies.

Nies is a verb meaning to sneeze.

In this sentence, Sy nies means She sneezes / She is sneezing. Afrikaans verbs usually do not change form much depending on the subject, so the same verb form is used with different people:

• ek nies
• jy nies
• sy nies
• ons nies

Afrikaans often uses the simple present where English would use a continuous form.

So Sy nies die hele oggend can express an ongoing action even though there is no separate is sneezing form. The idea of duration comes from die hele oggend.

In natural English, you would often translate it as She has been sneezing all morning, even though the Afrikaans structure is simpler.

Die hele oggend means the whole morning or all morning.

This is a very common Afrikaans pattern:

• die hele dag = all day
• die hele nag = all night
• die hele week = all week

So die hele oggend is just the normal way to say all morning.

Because haar means her, while possessive sy means his.

So:

• haar keel = her throat
• sy keel = his throat

That is an important distinction, because sy as a subject pronoun can mean she, but as a possessive it means his.

Keel means throat.

It is the normal everyday Afrikaans word for the part of the body you use for swallowing and speaking.

Voel means feel, and seer means sore, painful, or hurting.

So haar keel voel seer literally means her throat feels sore.

This is a natural Afrikaans way to describe physical discomfort. It focuses on the sensation. You may also hear Haar keel is seer, but voel seer highlights how it feels.

Here, seer describes the condition of the throat, so it works like a predicate adjective: sore.

Afrikaans uses seer very often when talking about pain:

• My kop is seer. = My head hurts / My head is sore.
• Ek het 'n seer keel. = I have a sore throat.
• Dit doen seer. = That hurts.

So in this sentence, seer tells you what the throat feels like.

Because en is a coordinating conjunction, not a subordinating one.

After en, Afrikaans keeps normal main-clause word order:

• haar keel voel seer

So the subject comes before the verb, just like in an ordinary statement.

If this were a subordinate clause introduced by a word like omdat, the word order would be different.

No. They only look similar.

• nies = sneeze
• nie = the Afrikaans negative particle

That is a very common beginner confusion. For example:

• Sy nies. = She sneezes.
• Sy nies nie. = She does not sneeze.

So in your sentence, nies is definitely the verb sneeze, not part of negation.