Hän lupasi tehdä uuden päivityksen.

Breakdown of Hän lupasi tehdä uuden päivityksen.

hän
he / she
uusi
new
tehdä
to do
päivitys
update
luvata
to promise

Questions & Answers about Hän lupasi tehdä uuden päivityksen.

Why is the object uuden päivityksen in the genitive case instead of the partitive?
Here, the object of the infinitive tehdä is a total object, meaning the action of making the update will be fully completed. Because the main verb lupasi has a subject (hän), the total object takes the genitive-like accusative ending -n.
Since this lesson is about cognitive verbs taking the elative case, why isn't the elative used here?
While many cognitive verbs describing thinking or communicating take the elative (ending in -sta/-stä), luvata (to promise) behaves differently. When you promise to do an action, it simply governs the first infinitive, which is tehdä here.
What type of verb is lupasi and what is its base form?
The base form is luvata (to promise), which is a Type 4 verb. In the past tense, Type 4 verbs replace their infinitive ending with -si. You can also see reverse consonant gradation here: the weak -v- in the infinitive strengthens to -p- in lupasi.
How does the word päivityksen get its shape?
The basic nominative form is päivitys (update). In Finnish, nouns ending in -us/-ys change their stem to end in -ukse-/-ykse- before adding grammatical endings. So päivitys becomes the stem päivitykse-, to which the genitive -n is attached.

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