Su vs Tu

Question

"Tu" means "you" or "your" and is informal. "Usted" is the formal way of saying "you". Correct? It is the same when using "tu" versus "su"? Is "su" formal? How do you know when to use "tu" or "su"'

Answer 1

Use the familar tú as a subject pronoun when addressing a friend, family member, younger person
Tú eres muy simpático. You are very nice.
Tu is the singular familiar possessive adjective used to modiffy something sinular that the person possesses.
¿Es tu libro? Is this your book?
Su is the 3rd person possessive adjective. It is used to modify a singular noun that is possessed by him, her, you formal, or they.
Es su casa. It is his/ her/ your/their house.

Answer 2

l'll put this into practice. Thanks, Cherry.

Answer 3

You are very welcome. I'm glad that I could help you.

Answer 4

The only thing to be careful with here (and Cherry mentioned it) is the you formal. As a general rule, use the "you formal" (or Usted) form with people you aren't on a first name basis with, or who are your elder.
To my boss, I would say:
Es su silla? - Is it your (formal) chair?
But the same question to my brother would be:
Es tu silla? - Is it your (familiar) chair'

Answer 5

I meant to ask Cherry that question. Thanks.

Answer 6

I'm just a beginner at espanol. I'll have to try and translate this to understand it better.

Answer 7

Yes, It's becoming clear now. I translated the third sentence as "Meche forgot her umbrella at home. Is this correct'