Klingon verbs mark for aspect but not for tense, which is indicated where necessary by context and by time adverbs. Prefixes mark subject and object. There are ten types of suffix, and as with nouns, a verb can have no more than one suffix of any type. (The tenth type, called rovers, are an exception.) Again as with nouns, the types of suffix must appear in a strict order, indicated by their type number: a type 2 suffix goes before a type 3 suffix, but after a type 1 suffix. A rover suffix can go between any of them.Okrand 1992, p.44
