Breakdown of Kyllä sinä osaat pysäköidä.
sinä
you
osata
to know how to
kyllä
definitely (emphasis)
pysäköidä
to park
Questions & Answers about Kyllä sinä osaat pysäköidä.
Why is kyllä at the start of the sentence instead of answering a question?
Here, kyllä is not the word 'yes' answering a question. It acts as an epistemic adverb, which means it asserts that the statement is absolutely true. In English, it translates to 'certainly,' 'surely,' or the emphatic 'do' (as in 'You do know how to park'). It is often used to reassure someone who is doubting themselves.
Does kyllä have to be the first word in this kind of sentence?
Usually, yes. When used to emphasize the truth of the whole sentence, kyllä strongly prefers the first position. If you moved it (for example, Sinä kyllä osaat pysäköidä), it would still emphasize the verb, but placing it first makes the reassurance or assertion feel much stronger and more immediate.
I sometimes mix up verbs for 'can'. Why use osata instead of voida here?
Osata specifically means having the skill or know-how to do something. Voida means having the physical possibility, time, or permission. Since parking is a learned skill, osata is the correct choice. Using voida here would instead mean 'You are permitted to park' or 'Nothing is physically stopping you from parking.'
Would a Finn actually say pysäköidä in a casual conversation?
They might, as it is the standard language word and widely understood. However, in casual spoken Finnish, you will very often hear the colloquial loanword parkkeerata instead (as in Kyllä sä osaat parkkeerata).