koop ("to buy") and verkoop ("to sell") are the same verb wearing opposite hats — verkoop is literally koop with the prefix ver- stuck on the front. Yet that one prefix flips their behaviour in the past tense, and it does so in the cleanest, most teachable way in the whole language. koop makes its perfect the normal way, het gekoop; verkoop makes its perfect with no ge- at all — het verkoop. If you understand why these two cousins diverge, you understand the entire ver- class of verbs.
The forms
| Verb | Present | Perfect | Future | Imperative |
|---|---|---|---|---|
| koop | koop | het gekoop | sal koop | Koop! |
| verkoop | verkoop | het verkoop | sal verkoop | Verkoop! |
Look closely at the perfect column. koop takes the ordinary participle prefix ge-: gekoop. verkoop takes none — its perfect is identical to its infinitive, verkoop. The present tense is the same word for every subject in both: ek koop, jy koop, sy verkoop, ons verkoop.
Ek het gister 'n kar gekoop.
I bought a car yesterday.
Sy verkoop blomme by die mark.
She sells flowers at the market.
Ons sal die huis volgende jaar verkoop.
We'll sell the house next year.
Why verkoop takes no ge-
Afrikaans forms most past participles by clamping ge- onto the front of the verb: koop → gekoop, werk → gewerk, speel → gespeel. But a small set of unstressed prefixes — ver-, be-, ge-, ont-, her-, er- — already sits in the slot where ge- would go and is treated as part of the verb. You cannot stack a second ge- on top of one of these prefixes, so the participle simply is the infinitive: verkoop → verkoop, betaal → betaal, verstaan → verstaan.
The stress is the giveaway. In verKOOP the stress falls on the second syllable, koop, and the ver- is a weak, unstressed prefix — exactly the kind that blocks ge-. Compare a separable prefix like op- in opbel ("phone up"), which is stressed and does take ge- inside (opgebel). The rule is mechanical once you hear the stress.
Hulle het hul ou meubels verkoop.
They sold their old furniture.
Die winkel het alles teen 'n afslag verkoop.
The shop sold everything at a discount.
For the full list of these prefixes and the verbs that use them, see inseparable prefixes; for the contrasting separable verbs that do take ge- inside, see separable verbs.
koop: who and what you buy
koop takes a direct object (the thing bought) and marks the person you buy for with vir. This vir genuinely means "for" — the beneficiary — which is a different job from the dative vir of gee and vra, though it looks the same.
Koop vir my brood as jy by die winkel is.
Buy me bread if you're at the shop.
Hy het vir sy dogter 'n fiets gekoop.
He bought his daughter a bicycle.
Wat het jy by die mark gekoop?
What did you buy at the market?
verkoop: who you sell to
When you sell something to someone, the recipient is introduced by aan ("to"): verkoop iets aan iemand. The aan marks the person ownership passes to. In everyday speech you will also hear vir in this slot (Hy het dit vir my verkoop), but aan is the careful, standard choice and is never wrong.
Hy het dit aan my verkoop.
He sold it to me.
Die boer verkoop sy vrugte direk aan die publiek.
The farmer sells his fruit directly to the public.
Sy het haar kar vir 'n vriend verkoop.
She sold her car to a friend. (everyday vir)
For the wider family of buying, selling, paying and ordering verbs and how each marks its participants, see transaction verbs.
The pair in one sentence
Because they are mirror images, koop and verkoop often turn up in the same breath — one person's purchase is another's sale.
Ek het die fiets goedkoop gekoop en dit toe duurder verkoop.
I bought the bike cheap and then sold it for more.
Common mistakes
❌ Hy het dit aan my geverkoop.
Incorrect — verkoop takes no ge-; the participle is verkoop.
✅ Hy het dit aan my verkoop.
He sold it to me.
❌ Ek het 'n kar koop. (past)
Incorrect — the perfect needs the participle: het 'n kar gekoop.
✅ Ek het 'n kar gekoop.
I bought a car.
❌ Sy verkoop blomme aan vir die mense.
Incorrect — use one preposition: aan die mense (or colloquial vir die mense), not both.
✅ Sy verkoop blomme aan die mense.
She sells flowers to the people.
❌ Koop my 'n brood.
Incorrect — the beneficiary needs vir: koop vir my 'n brood.
✅ Koop vir my 'n brood.
Buy me a bread roll.
Key takeaways
- koop is ordinary: perfect het gekoop, future sal koop.
- verkoop carries the unstressed prefix ver-, which blocks the participle ge-: the perfect is het verkoop, identical to the infinitive.
- The general rule: unstressed prefixes (ver-, be-, ge-, ont-, her-, er-) take no ge- in the perfect — gekoop but verkoop.
- You koop vir someone (buy for the beneficiary) but verkoop aan someone (sell to the recipient); colloquial vir also appears with verkoop.
- Never write geverkoop — that double prefix is the single most common error with this verb.
Now practice Afrikaans
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Start learning Afrikaans→Related Topics
- Transaction Verbs: koop, verkoop, betaal, kos, leen, ruilA2 — A lookup table of the core Afrikaans commerce verbs — koop, verkoop, betaal, kos, leen, ruil, bestel — with each one's participle, a natural example, and notes on the no-ge inseparables and the lend/borrow trap in leen.
- Inseparable Prefixes: be-, ver-, ont-, her-, er-, ge-B1 — The unstressed bound prefixes be-, ge-, her-, ont-, ver- and er- that never detach from the verb and suppress the ge- of the past participle — with stress as the diagnostic.
- Common Separable Verbs (Reference)A2 — A reference table of the most frequent Afrikaans separable verbs, each shown in its split main-clause form, its joined subordinate-clause form, and its past participle.