Questions & Answers about Myykö hän herkullista juustoa?
Why is it herkullista instead of the dictionary form herkullinen?
In Finnish, adjectives must match the case of the noun they describe. Since the noun juustoa is in the partitive case, the adjective describing it must also take the partitive case.
How does the word herkullinen change into herkullista?
For Finnish words ending in -nen, you drop the -nen and add -sta (or -stä depending on vowel harmony) to form the partitive case. So, herkullinen becomes herkullista.
Why is the word for cheese (juustoa) in the partitive case here?
Juusto is a mass noun (an uncountable substance). When a mass noun is the object of an action like being sold, it takes the partitive case. It implies selling "some cheese" rather than one whole, specific cheese.
What is the -kö at the end of myykö?
It is a question particle. To turn a statement into a "yes/no" question, you attach -ko or -kö to the verb and move it to the front of the sentence. Myy means "sells", so myykö means "does [he/she] sell?".
The translation says "he", but could hän also mean "she"?