Breakdown of Hän haluaa puhdistaa vallin.
hän
he / she
haluta
to want
puhdistaa
to clean (an object, wound, etc.)
valli
the cushion
Questions & Answers about Hän haluaa puhdistaa vallin.
Why is the object vallin in the genitive-accusative case rather than the nominative?
This sentence features a predicate chain: the finite verb haluaa followed by the infinitive puhdistaa. In these chains, the object inherits its case rules from the main verb. Because haluaa has a normal subject (hän), the total object takes the standard genitive-accusative ending -n.
How would the object change if the main verb was a necessity verb like täytyy?
If the sentence were "He must clean the cushion" (Hänen täytyy puhdistaa...), the object would lose its -n ending and become the nominative-accusative valli. This is because necessity verbs take a genitive "subject" rather than a grammatical nominative subject, so the object in the chain inherits this subjectless rule and defaults to the nominative.
Why does haluaa trigger the first infinitive puhdistaa here instead of another verb form?
The verb haluta (to want) always chains with the first infinitive, which is the standard dictionary form of a verb. This is a good contrast to verbs expressing starting or moving (like ruveta or mennä), which typically require the third infinitive ending in -maan or -mään.
Could vallin be in the partitive case (vallia) in this exact verb chain?
Yes, if you wanted to express that the cleaning action is incomplete, ongoing, or only applies to an unspecified part of the cushion (Hän haluaa puhdistaa vallia). Using the total object vallin implies he intends to successfully finish cleaning the entire cushion.
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