In the following article, we analyze the polyfunctional form with =ZA in the Altai language. Traditionally, this form is viewed as a marker of conditional mood. Our materials show that its semantics and functions are very varied. It can be used not only in infinite functions within polypredicative constructions, but also as an independent finite form with the meaning of a non-real, contrafactive volition. When it is used as a dependent predicate, this form mainly denotes modality of an action’s conditions according to the speaker’s point of view. When one uses the if conjunction, the expected action-condition may not take place, and when the when conjunction is used, such possibility is not considered, but rather, temporal relations are expressed (consecution, simultaneity, general temporal correlation). Specific temporal meanings depend on specific tense forms of finite predicates: if the predicate of a main clause is in present tense, the construction denotes general temporal correlation; if a future tense form is used, it denotes consecution or simultaneity in the future; the past tense denotes consecution in the past. With a 2nd person singular and plural affix =ZAŋ, =ZAgAr expresses the meaning of soft incentive. The =ZA form as a marker of concessive mood denotes completion of an action in spite of conflicting conditions, which demonstrates the shift of this form towards other mood forms.