Interrogative Pronoun "哪儿" (nǎr)

In Mandarin Chinese, "哪儿" (nǎr) is used to inquire about a location or direction.

Examples:

• 你在哪儿？(Nǐ zài nǎr?) - Where are you?
• 他去哪儿了？(Tā qù nǎr le?) - Where did he go?
• 这本书是哪儿买的？(Zhè běn shū shì nǎr mǎi de?) - Where was this book bought?

Additional Notes:

The pronoun "哪儿" (nǎr) is often used in combination with verbs like "在" (zài) or "去" (qù) to indicate location or direction.