Questions & Answers about Minä kuumennan kahvia.
Because -n is the 1st person singular ending in Finnish. It shows that the subject is I.
- kuumentaa = to heat
- kuumennan = I heat / I am heating
So even without minä, the verb already tells you the subject is I.
Not always. Finnish often leaves the subject pronoun out when the verb ending already makes the subject clear.
So both of these are possible:
- Minä kuumennan kahvia.
- Kuumennan kahvia.
The version with minä can sound more explicit or emphatic, like I am heating coffee.
The dictionary form is kuumentaa, meaning to heat.
This sentence uses the present-tense 1st person singular form:
- kuumentaa → kuumennan
So if you look the word up in a dictionary, you would search for kuumentaa.