Due to language-contact phenomena Gagauz shows significant deviations from Turkic patterns, most obvious on the syntactic level. In what follows, I will deal with a set of modal constructions expressing volition, necessity, ability and possibility. Expressions for volition and necessity are formed in Gagauz analytically using the same lexical and morphological material as their Turkish counterparts but deviate in respect to constituent order and/or frequency. For ability and possibility on the other hand, Turkish uses the synthetic construction in -Ebil-. This modal marker can be found in Gagauz too, but serves only to express ability, whereas for possibility Gagauz has invented new analytically built constructions copied from a Bulgarian pattern.