1. POSSESSIVE ADJECTIVES
There are 2 ways to express possession in English.
Use ‘s to show an item belongs to a specific person
Ex. Maria’s sweater
2. Use a possessive adjective
Ex. my sweater
Instead of adding ‘s to the owner, Spanish uses this formula:
Possession + de + owner
Ex. El suéter de Maria

2. Here are the possessive adjectives in Spanish
My – mi, mis
Your (fam.s.)- tu, tus
Your (Form.s.)-
su, sus
His, her, its, their- su, sus
Our – nuestro, nuestra, nuestros, nuestras
Your (fam.pl.) – vuestro, vuestra, vuestros, vuestras
Your (form.pl.) –
su, sus

3. Examples: His book – su libro His books – sus libros
Our book – nuestro libro
Our books – nuestros libros
Therefore, su libro could mean his book, her book, their book or your book.
Of course, Spanish has a way to specify each of these!

4. To specify or clarify De él – his De ella – her
De usted – your (form. S.)
De ustedes – your (you all’s)
De mí – my
De ti – your (fam. Sing.)

5. Examples Es el libro de ella. It’s her book.
Es la chaqueta de ellos. It’s their jacket.
Es la falda de ti. It’s your skirt.
You can use nouns or names in this fashion ,too!
Ex. Es el libro de Sra. Lilly