Prepositions are commonly known as linking words. They connect nouns, verbs, and other vital words.
Common Italian Prepositions
Pepositions in Italian don't always have a single equivalent to their English counterparts.
The prepositions a, da, di, in, and su can be combined with a definite article to form one word. These are called contractions or articulated prepositions.
Vado a+il negozio. = Vado al negozio. I am going to the store.
Sono i libri di+gli studenti. = Sono i libri degli studenti. They are the students' books.
The prepositions con, per, and tra do not form a contraction when they are followed by a definite article.
Mio padre parla con il mio amico.
My father is speaking with my friend.
Il libro d'italiano è tra il dizionario e il calendario.
The Italian book is between the dictionary and the calendar.