in croatian, nouns change form depending on the composition of the sentence. this is called declension. for people who are learning croatian, declension is the most difficult part of the language to master. it is very complicated and time consuming to explain it and because of that we will use simpler techniques. however, many languages have noun and pronoun declension, including english. in english, though, only pronoun declension now remains. let us start by explaining all of the seven croatian grammatical cases. the technique that is most frequently used in determining grammatical cases (the same technique is used in croatian schools when taught to children) is by asking yourself a question when you are trying to figure out which case a noun should be in. in croatian, grammatical cases are called padeži (plural) and padež (singular).