Bulgarian, like English, has a very complex system of verbal tense, unlike Russian. Nouns and adjectives are very similar because of the Slavic ancestry.

For example, if you take a sentence like
John saw him do it.
You get several Bulgarian possibilities for "saw"
1) I absolutely vouch for this statement
2) John told me he did, but I'm not sure.
3) John told me he did, but I doubt it.
all these expressed in the verb. That's about all I remember about my Bulgarian verbs (I actually did study Bulgarian at the University of Chicago!)