Learn Hardcore Afrikaans: Ons huis het die grootste tuin.

Ons is the first-person plural possessive pronoun, meaning our. In Afrikaans, a possessive pronoun replaces the need for an article when indicating ownership. That’s why you don’t use ’n (a/an) or die (the) before huis in this case.

What does het mean here and how is it related to the infinitive hê?

Het is the third-person singular present-tense form of hê (to have). It indicates possession—so Ons huis het literally means Our house has. The infinitive is spelled hê (with a circumflex over the e), but in the present tense you always use het.

How is the superlative grootste formed, and why is die used?

To form the superlative in Afrikaans, you add -ste to the adjective:

groot → grootste
You then precede it with the definite article die, because superlatives are always definite.
Examples:
die grootste (the biggest)
die slimste (the smartest)

What is the difference between groter and grootste?

Groter is the comparative form, meaning bigger (e.g. My tuin is groter – My garden is bigger).
Grootste is the superlative form, meaning biggest (e.g. die grootste tuin – the biggest garden).

What does tuin mean, and does it have any other common meanings?

Tuin means garden or yard—the outdoor area around a house, often with grass, flowers or plants. It does not mean farm, attic or any other indoor space.

Why is the word order Ons huis het die grootste tuin, and how would I turn it into a question?

Afrikaans follows a Subject-Verb-Object structure here, just like English:

Subject: Ons huis (Our house)
Verb: het (has)
Object: die grootste tuin (the biggest garden)

To make a yes/no question, swap the subject and verb:
Het ons huis die grootste tuin?
(Does our house have the biggest garden?)

How do I make this sentence negative?

Afrikaans uses a double nie for negation. Place the first nie right after the verb and the second at the end of the clause:
Ons huis het nie die grootste tuin nie.
(Our house does not have the biggest garden.)