Sy lees poësie.

Yes. Sy can also mean his.

The meaning depends on grammar and position:

• Sy lees poësie = She reads poetry
• sy boek = his book

So when sy comes before a verb like lees, it usually means she. When it comes before a noun like boek, it can mean his.

Afrikaans verbs usually do not change for person in the present tense.

So you get:

• ek lees = I read
• jy lees = you read
• hy lees = he reads
• sy lees = she reads
• ons lees = we read

This is much simpler than English, where you have I read but she reads.

It can mean either one, depending on context.

Afrikaans often uses the simple present for both:

• a general habit: She reads poetry
• an action happening now: She is reading poetry

If you want to make the ongoing action very clear, Afrikaans can use a longer form such as Sy is besig om poësie te lees, but the simple sentence Sy lees poësie is very common.

Because poësie is being used in a general, uncountable sense, like English poetry.

Compare:

• Sy lees poësie = She reads poetry
• Sy lees die poësie van Ingrid Jonker = She reads the poetry of Ingrid Jonker

So in your sentence, poësie means poetry in general, and no article is needed.

No. Poësie means poetry in a general sense, not one individual poem.

If you want to say a poem, you would say 'n gedig. If you want to say poems, you would say gedigte.

So:

• Sy lees poësie = She reads poetry
• Sy lees 'n gedig = She reads a poem
• Sy lees gedigte = She reads poems

Those dots are called a diaeresis or trema. They show that the vowels are pronounced separately.

So poësie is read in separate parts, roughly like po-uh-see, rather than treating oe as one single sound.

This helps the reader see the correct syllables and pronunciation.

The sentence uses the normal Afrikaans main-clause word order:

subject + verb + object

So:

• Sy = subject
• lees = verb
• poësie = object

This is very similar to English: She reads poetry.

You would say:

Sy lees nie poësie nie.

Afrikaans usually uses a double nie in standard negation:

• the first nie comes after the verb or verb phrase
• the second nie comes near the end of the sentence

That double negative pattern is a very important feature of Afrikaans.

In a main clause, Afrikaans usually keeps the verb in the second position.

So if you move another element to the front, the verb still comes next:

• Sy lees poësie.
• Vandag lees sy poësie. = Today she reads poetry.

Notice that when Vandag moves to the front, lees still stays second, and sy moves after the verb. This is a very important Afrikaans word-order rule.