Adverbs' comparative forms are identical to the nominative neuter singular of the corresponding comparative adjective. Nouns in Slovene are either masculine, feminine or neuter gender. Many feminine nouns are regular but many masculine and neuter nouns are not. The third declension group includes masculine, feminine and neuter nouns. There are only four 4th declension neuter nouns. Animals are triple-gender nouns, being able to take masculine, feminine and neuter pronouns. Norwegian nouns belong to three noun classes (genders)&colon; masculine, feminine and neuter. Nouns belong to one of three genders&colon; masculine, feminine and neuter. This group of nouns includes masculine, neuter, and feminine nouns. This declension contains nouns that are masculine, feminine, and neuter. In principle, animals are triple-gender nouns, being able to take masculine, feminine and neuter pronouns. An instance of neuter gender also exists in pronouns of the third person singular. Nouns belong to one of three genders (masculine, feminine, and neuter). Note that the ending for genitive masculine and neuter is "-en". Adjectival adverbs are formed by putting the adjective in the neuter singular form.