Learn Finnish: Mennään huomenna huvipuistoon! - Let's go to the amusement park tomorrow!

Yes, mennään is technically the present passive form of mennä (to go). However, in everyday spoken Finnish (puhekieli), the passive form is used to say "let's [do something]" when used on its own without a pronoun. This is exactly how you form suggestions in Finnish!

How would you say "let's go" in formal written Finnish (kirjakieli)?

In strict formal Finnish, the first-person plural imperative is used: menkäämme. However, this sounds very poetic, dated, or official. In almost all daily situations, including casual writing, Finns just use the passive mennään.

Why does huvipuistoon end in -on instead of just being huvipuisto?

The verb mennä requires a location to be in a "destination" case because it expresses movement towards somewhere. Here, we use the illative case (the "into" case). Because huvipuisto ends in an -o, we double that vowel and add -n, creating huvipuistoon (into the amusement park).

Is huvipuisto a compound word?

Yes! It is made up of huvi (amusement, fun, pleasure) and puisto (park). Spotting these compound words is a great B1 skill that makes memorizing long Finnish vocabulary much easier.