Liittyä ^{(Verb type1)}

1. to join

   liittyä (jäseneksi) puolueeseen ― to join a (political) party

2. to be related to, be associated with, be part of

   Asiat liittyvät toisiinsa.

   These things are related to each other.

3. to have to do with

   Muistelen, että hänen kirjansa liittyi avaruusolentojen tekemiin sieppauksiin.

   As I recall, his book had to do with alien abductions.

   Liittyykö tämä mitenkään suunnittelemaasi juhlaan?

   Does this have anything to do with the party you were planning?

   Kyllä, minulla on auto, mutta miten se liittyy pätevyyteeni toimistotyöhön?

   Yes, I have a car, but what does that have to do with whether I am qualified for a desk job?

4. (chemistry) to be added (be subjected to an addition reaction)

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".