1. For possession:
* 你的 (nǐ de): This is the most common way to say "your" in Mandarin. It literally means "your" and is used for possessive pronouns.
* Example: 你的书 (nǐ de shū) - Your book
2. For a question about ownership:
* 是你的吗 (shì nǐ de ma)? This means "Is it yours?" and is used to confirm ownership.
* Example: 这本书是你的吗? (zhè běn shū shì nǐ de ma?) - Is this book yours?
3. For a question about a quality or characteristic:
* 你是...? (nǐ shì...?): This literally means "Are you...?" and is used to ask about a person's quality or characteristic.
* Example: 你是学生吗? (nǐ shì xuéshēng ma?) - Are you a student?
4. For a question about a relationship:
* 你是...的 (nǐ shì...de)?: This means "Are you..." and is used to ask about a person's relationship with something or someone.
* Example: 你是他的朋友吗? (nǐ shì tā de péngyou ma?) - Are you his friend?
It's important to choose the right phrase based on the context and the meaning you want to convey.