questo = comes before a noun that is singular and masculine.
Questo libro e' interessante. = This book is interesting.
questa = comes before a noun that is singular and femine.
Questa lettera e' per Lei. = This letter is for you.
questi = comes before a noun that is plural and masculine.
Leggiamo questi libri. = We read these books.
queste = comes before a noun that is plural and femine.
Queste donne dormono troppo. = These women sleep too much.
quest' = comes before a singular noun that begins with a vowel.
Chi e' quest'uomo? = Who is this man?
Mi piace quest'arancia. = I like this orange.
parlare = to speak
io parlo = I speak
tu parli = you speak (informal)
Lei parla = you speak (formal)
lui parla = he speaks
lei parla = she speaks
noi parliamo = we speak
voi parlate = you speak (plural)
loro parlano = they speak
Inglese = English
Francese = French
Spagnolo = Spanish
libro = book
penna = pen
matita = pencil
carta = paper
quaderno = notebook or planner
sedia = chair
luce = light
finestra = window
scrivania = desk
pagina = page
porta = door
Change the 'o' to an 'i' to make it plural:
amico = friend, amici = friends
Change the 'a' to an 'e' to make it plural:
chiesa = church, chiese = churches
Change the 'ca' to a 'che' to make it plural:
banca = bank, banche = banks
Change the 'e' to an 'i' to make it plural: