Vaikuttaa ^{(Verb type1)}

1. (+ illative) to influence, have an influence on, affect, have an effect on, impact, have an impact on.

   Rankat sateet vaikuttivat selvästi järven vedenpinnan korkeuteen.

   The heavy rainfall clearly had an effect on the water level of the lake.

   Tämä vaikuttaa myös sinuun.

   This will affect you too.

2. (+ illative) to have an effect on, act, work; (alkaa vaikuttaa) take effect, start working

   Vaikuttiko antibiootti? / Kuinka nopeasti antibiootit vaikuttavat?

   Did the antibiotic have any effect? / How fast do antibiotics take effect?

3. (+ adjective in ablative or allative) to appear (to be), seem (to be).

   Hän vaikuttaa iloiselta.

   S/he seems to be happy.

4. (idiomatic, informal, + essive) to act as, to work as, to do (to have as one’s job)

   Hän vaikutti muutamia vuosia opettajana Oulussa.

   For a few years, s/he worked as a teacher in Oulu.

   Missä sinä nykyään vaikutat?

   What are you doing nowadays?

5. (military) to fire for effect

The present, imperfect, perfect, and pluperfect (past perfect) tenses in English correspond to "speaks", "spoke", "has spoken", and "had spoken".

The conditional present and perfect moods in English typically correspond to "would" and "would have".