The paper considers the interdependence between word order, congruence and formal cases – the means which, together with lexical meaning and formal class markers, explicate the concrete syntactic relations in a sentence. There are languages (including the Slavic ones) in whose structure congruence is very important. They may or may not possess formal cases. Even if they have no formal cases their word order is relatively free due to the compensatory role of congruence, which is often, but not always, able to eliminate potential ambiguity in the sentence, assisted to a certain extent by animacy, definiteness, pronoun duplicates of the objects and extra-linguistic knowledge (and Modern Bulgarian is good enough to illustrate this). At the same...