Here are some examples of how to use it in a sentence:
* तुम क्या पूछना चाहते हो? (Tum kya poochhna chahte ho?) - What do you want to ask?
* मैं उससे पूछूंगा। (Main usse poochhūngā.) - I will ask him/her.
* मुझे यह पूछना चाहिए। (Mujhe yeh poochhna chahiye.) - I should ask this.
Note: The verb "पूछना" is conjugated depending on the subject and tense.
Let me know if you'd like to learn more about asking questions in Hindi!