Nominal necessity (on pakko, on aika)

The nominal necessity construction

To express that someone must do something or that it is time to do something, Finnish uses a unique sentence structure:

• The person acting (the subject) is put in the genitive case (e.g., minun, meidän, isän).
• This is followed by a fixed necessity phrase like on pakko (must / have to) or on aika (it is time to).
• The action verb is in the 1st infinitive (the basic dictionary form).

There is a critical rule for these sentences regarding the object. Normally, a total object takes the genitive-accusative ending -n. However, necessity structures trigger total object case drop. The object drops the -n and appears in its basic nominative form instead.

Dealing with tight deadlines

These constructions are highly common when talking about urgent tasks, such as arranging a last-minute move or managing a lack of time (aikapula). Notice how the subject remains in the genitive and the object stays in the nominative, even when the sentences become more complex or use two verbs in a row.