Breakdown of Tiedätkö, ostiko hän kahdet aurinkolasit?
hän
he / she
tietää
to know
kaksi
two
ostaa
to buy
aurinkolasit
sunglasses
Questions & Answers about Tiedätkö, ostiko hän kahdet aurinkolasit?
Why do we use the plural numeral kahdet instead of just kaksi here?
Aurinkolasit (sunglasses) is a word that naturally comes as a pair and is used in the plural form. When you want to count items that are inherently plural, you must use the plural form of the number. Therefore, kaksi becomes kahdet.
Why is the object kahdet aurinkolasit in the nominative case instead of the partitive?
The action of buying the sunglasses is complete, meaning this is a total object. For plural words, the total object takes the plural accusative case, which looks exactly the same as the nominative plural (ending in -t). If it were an ongoing or incomplete action, you would use the plural partitive: kaksia aurinkolaseja.
How does the -ko suffix work on ostiko?
While you know the clitic -ko/-kö from direct yes/no questions (like Tiedätkö?), it is also used to form indirect questions translating to 'if' or 'whether' in English. So ostiko hän translates to 'whether he bought' or 'if he bought'.
Could I ever say kaksi aurinkolasia?
While you might hear native speakers say this in casual speech, it is grammatically incorrect for eyewear. Because lasi in the singular means a drinking glass or the material glass, kaksi aurinkolasia technically sounds like you are buying two individual lenses or two drinking glasses meant for the sun.
Learn Tiedätkö, ostiko hän kahdet aurinkolasit and more in Finnish
All course content and exercises are completely free — no paywalls, no trial periods, no signup needed.
- ✓ Practice with interactive exercises
- ✓ Track your progress with spaced repetition
- ✓Learn at your own pace — completely free