Learn Finnish: Uudessa talossa on iso keittiö. - There is a big kitchen in the new house.

In Finnish, sentences that express 'there is' or 'there are' usually start with the location. This is called an existential sentence. Instead of saying 'A big kitchen is in the new house,' Finnish says 'In the new house is a big kitchen' (Uudessa talossa on iso keittiö).

Why does the word for 'new' have the -ssa ending just like talossa?

In Finnish, adjectives must match the noun they describe. Because talo (house) is in the 'in' case (talossa), the adjective uusi (new) also has to take the same -ssa ending to become uudessa.

How does uusi (new) become uudessa? Why isn't it just 'uusissa'?

Finnish words ending in -si often undergo a stem change before you add most endings. For uusi, the -si changes to -de-. So, the basic word uusi gives us the stem uude-, and adding -ssa makes it uudessa.

Why are iso and keittiö in their basic forms?

In 'there is' sentences, the thing that exists (the big kitchen) acts as the subject. Because it is a single, countable thing being introduced, it stays in the basic, dictionary form (the nominative case).