Nominal compounds are quite frequent. Some derivational verbal suffixes are rather productive, e.g. "jar'"- 'to speak', "jarilts"- 'to speak with each other'. Formally, the independent words derived using verbal suffixes can roughly be divided into three classes: final verbs, which can only be used sentence-finally, i.e. -"na" (mainly future or generic statements) or –"ø" (second person imperative); participles (often called "verbal nouns"), which can be used clause-finally or attributively, i.e. -"san" (perfect-past) or -"maar" ('want to'); and converbs, which can link clauses or function adverbially, i.e. -"ž" (qualifies for any adverbial function or neutrally connects two sentences) or -"tal" (the action of the main clause takes place until the action expressed by the suffixed verb begins).