Learn Italian: Le ragazze sono alte e intelligenti. - The girls are tall and intelligent.

Adjectives in Italian usually fall into two main groups. Alto (tall) belongs to the first group, which has four endings: -o (masculine singular), -a (feminine singular), -i (masculine plural), and -e (feminine plural). Since ragazze is feminine plural, we use alte. However, intelligente belongs to a second group that only has two endings: -e for singular and -i for plural, regardless of gender. Since the girls are plural, it becomes intelligenti.

How do I know ragazze is plural?

The singular word for "girl" is ragazza, ending in -a which is the standard feminine singular ending. To make most feminine nouns plural in Italian, you change the final -a to an -e, giving us ragazze.

Why is the article Le instead of I or Gli?

Le is the only word for "the" used with feminine plural nouns. Since ragazze (girls) is feminine plural, we must use Le. The articles i and gli are only used for masculine plural nouns.