Istua ^{(Verb type1)}

1. (intransitive) to sit
2. (intransitive) to be a member in a board or similar

   Johannes Virolainen istui eduskunnassa peräti 42 vuotta.

   Johannes Virolainen was a member of parliament for as much as 42 years.

3. (intransitive, of clothes., etc, + allative) to suit (a person)
4. (transitive, + partitive) to be in jail, serve

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".