Learn Finnish: Mies menee kirkon sisälle. - The man goes inside the church.

kirkon is the genitive (possessive) form of kirkko. In Finnish, words that indicate position, like sisälle (inside), usually require the noun before them to be in this possessive form. You can think of it literally as the man going to the church's inside.

Why does sisälle end in -lle?

The -lle ending shows movement toward a place. Because the man is actively moving into the church, we use sisälle (to the inside). If he were already standing inside, you would use the static form sisällä (in the inside).

Is it also correct to say Mies menee kirkkoon?

Yes, absolutely! Mies menee kirkkoon uses the standard location ending to mean that the man goes into the church. Saying kirkon sisälle is just another way to say it, putting a little more focus on the specific physical space inside the building.

What is the dictionary form of menee?

The dictionary form is mennä (to go). It is a type 3 verb, which means the core of the word changes from menn- to mene- before you add the ending. For the he/she/it form, you double the last vowel, making it menee.