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No universal rule can be given for whether an adjective precedes or follows a noun. Saying forma puellae is okay - it means the same thing - but it is not quite as good Latin, and is typical of later Latin that has been corrupted by vernacular influences. The - arum is distinctive, and you will not miss it. This often happens you must make a choice from the alternatives that makes sense. Unfortunately, it looks just like puellae the plural. Here, puellae is not girls, it means "of the girl," and is a different case, the genitive. The beauty of the girl would be expressed as puellae forma. The rules are just made up by grammarians, and often are simply aids to memory, not theory. To be technical, the -a- is really part of the stem, but it is usual to treat it as part of the ending. I won't explicitly separate stem and ending from now on, unless it is necessary for clarity, since it is usually easy to figure out.
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Similarly, form-a is form, shape, or beauty, and form-ae are forms, shapes, or beauties.
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If you have more than one girl, the word is puell-ae. When you want to say something about one girl, this is the word you use. This is the nominative singular case, used to name what you are talking about in a sentence. The association of genders and declensions is accidental. The declension of a noun is determined by the spelling of the word, usually the final vowel of the stem, not its gender or meaning. As the cases change, the radius declines from a vertical position to a horizontal one, so the process is called declension. The word "case" itself comes from casus, -us or "falling" (fourth declension). Greek geometers thought of the cases of nouns as radii in a circle, with the "independent" nominative and vocative cases a vertical radius, casus recti, with the other cases inclined more and more in the first quadrant, the casus obliqui or dependent cases, that had to lean on something. Subjecting a noun to inflection is called declension. All these words are connected by undergoing the same inflections. There are also pronouns, which merely point out without describing, such as ego (I) or tu (thou). The classification is not exclusive, and one word can be either. The two big classes of nouns are the noun-substantives (usually called simply nouns) that describe a thing, and noun-adjectives (usually called simply adjectives) that describe qualities of things.
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Each case corresponds to a different role of the word in a sentence, and is very important. Nouns, therefore, are much less complicated than verbs. The endings of nouns show number (singular or plural), gender (masculine, feminine, or neuter), and case (nominative, genitive, dative, accusative, or ablative). Sing.The phrase in the last lesson says: "Now you are demanding water from pumice," or "blood from a turnip" in the modern vernacular. Thus, the unusual case of Masculine First Declension Nouns ending in -a is found most in nouns stating an occupation such as nauta (masc.) meaning "sailor." Below is a detailed chart showing similarities as well as differences between the declensions: The reason for this is because the feminine 'alpha' (left over from Greek/Proto-Indo-European languages) was fundamentally used to speak of collective units. There are exceptions, such as the Neuter Nom./Acc. For instance, -o/u/e tends to be Masculine or Neuter, but -a tends to be Feminine. First, the connecting vowels of these declensions reflect the Gender of word.
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