Learn Hardcore Finnish: Tämä koti on uusi.

In Finnish, Tämä generally points to something physically or contextually near the speaker. Tuo refers to something farther away, and Se can be more neutral or refer back to something already mentioned. Here, Tämä emphasizes that the home is 'this one here' (close to the speaker).

Why is koti in its basic form rather than having an ending?

Koti is the subject of the sentence and is in the nominative singular form. In a simple statement where the noun is the subject, Finnish typically uses the unmodified (nominative) form.

What does on mean and why is it used?

On is the third-person singular form of the verb olla (to be). It links the subject (koti) to the adjective (uusi), making a basic statement of being (e.g., "is new").

Why does uusi have no extra ending?

When an adjective describes a singular noun in a simple statement, it appears in the nominative singular form. So uusi stays unmodified to agree with the subject koti in genderless Finnish grammar.

How would you turn this sentence into a negative or a question?