Indefinite article
| Masculine gender | Feminine gender | ||
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| UN | if the noun begins with a vowel* | UN´ | if the noun begins | 
| ragazzo | or a consonant** (except | amica | with a vowel* | 
| signore | the words beginning with | idea | 
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| aereo | s+consonant, z, y, ps, | italiana | 
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| i+vowel, gn, pn, x) | |||
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| UNO | if the noun begins with | UNA | if the noun begins | 
| studio | s+consonant, z, y, ps, i+vowel, | scuola | with any consonant** | 
| zio | gn, pn, x | signora | 
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| psicologo | 
 | nave | 
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 *vowels: a, e, i, o, u **consonants: b, c, d, f, g, k, l, m, n, p, q, r, s, t, v, w, z 
 The use of the indefinite article
					•the indefinite article accompanies a count noun in singular 
					•it introduces a new thing / person not mentioned before 
					•with mass nouns (vino, caffè, acqua) indicates a particular type: Chianti è un ottimo vino. 
					•in exclamations it itensifies the noun: Ho una fame. | |||