Questions & Answers about Jos talossa on tulipalo, valitse portaat.
How do I form the command valitse from the dictionary form?
Valitse comes from the Type 5 verb valita (to choose). The easiest way to form a command (the imperative mood) for anyone you would address as sinä is to take the "I" form of the verb in the present tense, which is minä valitsen, and simply drop the final -n. This leaves you with valitse (choose!).
What case is portaat in, and why?
Portaat (the stairs) is the object of your command. Normally, an object might take a genitive -n ending. However, when you use a command (the imperative mood), the object never takes the -n ending. Because "stairs" is a plural word (porras is a single step), it takes the basic plural marker -t, leaving it in the plural nominative form: portaat.
Why does the first part of the sentence start with talossa instead of tulipalo?
This is an existential sentence, meaning it expresses that something exists somewhere (like saying "there is a..." in English). In Finnish, these sentences naturally start with the location rather than the subject. So, it translates literally as "If in the house is a fire..."
Why use tulipalo instead of just tuli for fire?