Along with the Sorbian languages, Chakavian Croatian, and the extinct Old Church Slavonic, Slovene uses the dual. Although popular sources claim that Slovene has "preserved full grammatical use of the dual," Standard Slovene (and, to varying degrees, Slovene dialects) show significant reduction of the dual number system when compared with Common Slavic. In general, dual forms have a tendency to be replaced by plural forms. This tendency is stronger in oblique cases than in the nominative/accusative: in standard Slovene, genitive and locative forms have merged with the plural, and in many dialects, pluralization has extended to dative/instrumental forms. Dual inflection is better preserved in masculine forms than in feminine forms. Natural pairs are usually expressed with the plural in Slovene, not with the dual: e.g. "hands", ears. The dual forms of such nouns can be used, in conjunction with the quantifiers "two" or "both", to emphasize the number: e.g. "I only have two hands". The words for "parents" and "twins" show variation in colloquial Slovene between plural (, ) and dual (, ). Standard Slovene has replaced the nominative dual pronouns of Common Slavic ( "the two of us", "the two of you", "the two of them" [m./f./n.]) with new synthetic dual forms: (literally, "we-two"), , .