Here’s an introduction to Finnish:
Main article: Finnish grammar
The morphosyntactic alignment is nominative-accusative; but there are two object cases: accusative and partitive. The contrast between the two is telicity, where accusative denotes actions completed as intended (Ammuin hirven “I shot (killed) the elk”), and partitive denotes incomplete actions (Ammuin hirveä “I shot (at) the elk”).
Often this is confused with perfectivity, but the only element of perfectivity that exists in Finnish is that there are some perfective verbs. Transitivity is distinguished by different verbs for transitive and intransitive, e.g. ratkaista “to solve something” vs. ratketa “to solve by itself”.
There are several frequentative and momentane verb categories.