Breakdown of Olen käynyt Lontoossa kerran.
olla
to be
Lontoo
London
käydä
to visit, to go (and come back)
kerran
once, one time
Questions & Answers about Olen käynyt Lontoossa kerran.
Why does this sentence use käynyt instead of a form of olla (to be)?
In English, you say 'I have been to London.' But in Finnish, to express that you went somewhere and came back, you use the verb käydä (to visit). Using the verb olla here would just mean you were located there, but wouldn't convey the idea of a completed round trip.
Why is London in the -ssa (in) form here instead of a 'to' form?
The verb käydä (to visit) is a bit special in Finnish. Even though a visit involves movement to a place, you must use the static 'in' or 'at' location cases (-ssa / -ssä or -lla / -llä) with it. You are structurally saying you visited 'in' London, not 'to' London.
How is the perfect tense ('have visited') formed in olen käynyt?
The perfect tense uses the verb olla (to be) as a helper verb, followed by a specific past-tense form of the main verb. Here, olen (I am) acts as 'I have', and käynyt is the -nut/-nyt participle form of käydä (to visit).
Is the word kerran (once) related to the word kerta (time)?
Yes! Kerta means 'a time' or 'an occasion'. When you want to say 'once' or 'one time', you use the form kerran. Notice how the consonants change from -rt- to -rr- because adding the -n ending closes the syllable and triggers consonant gradation.
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