Use of tu and su
When/how is tu used as opposed to su?
1 Answer
"tu" without the accent is the familiar way of saying "your" (familiar)
"su" has several meanings. It can mean "his/her" or even "your" (formal) It can even mean "their" This is confusing to new learners.
These are called possessive adjectives, and the subject is a little more complicated than what it is in English.
Here's a link.