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Questions & Answers about Asiasta päätetään huomenna.
How is the passive form päätetään built from the dictionary verb päättää?
Päättää is a type 1 verb. To form the passive present, first find the weak stem by looking at the 'I' form (päätän) and dropping the -n, which gives päätä-. A special rule for type 1 verbs is that if the stem ends in -a or -ä, that vowel changes to -e-. So päätä- becomes pääte-. Finally, add the passive ending -tään, resulting in päätetään.
Why is the word for 'the matter' written as asiasta instead of just asia?
The verb päättää (to decide) requires the thing being decided upon to take the elative case ending (-sta or -stä). While in English we might just 'decide the matter', in Finnish you grammatically decide about the matter (asiasta).
Where is the subject of this sentence?
There is no subject. The Finnish passive voice is used when the actor is unknown, unspecified, or refers to people in general. It implies that 'someone' or 'a group' will decide, but deliberately leaves the exact actor out of the sentence.
If the action happens tomorrow, why is päätetään in the present tense?
Finnish does not have a dedicated future tense. You simply use the present tense along with a time word like huomenna (tomorrow) to show that the action will happen in the future.