nào

Here is how to use nào correctly:

• Word Order: Unlike English, nào follows the noun and its classifier. For example, "which book" is quyển sách nào. However, if the noun phrase has a relative clause, nào must go before the clause (e.g., Quyển sách nào mà bạn đã mua? - Which book did you buy?).
• Dropping the Noun: If the context is clear, you can drop the noun, but you must keep the classifier. You cannot just say "nào?" to ask "which?". You must say cái nào? (which one/thing?) or người nào? (which person?). However, Nào! can stand alone as an exclamation meaning "Come on!" or "Here we go!".
• No Classifier Needed: Some words don't use classifiers, such as countries (nước nào) or days (ngày nào). In these cases, nào attaches directly to the noun.
• Nào vs. Gì: Use gì (what) for open-ended questions, and nào (which) when selecting from a specific group.
• Building Question Words: Nào forms essential question words like chỗ nào (where), thế nào / như thế nào (how), and khi nào / lúc nào (when). Note a helpful guideline for khi nào: placing it at the beginning of a sentence often asks about the future, while placing it at the end usually asks about the past, though this is not an absolute rule.
• Encouraging Action: Nào can also be used as a sentence-final or sentence-initial particle meaning "Let's" or "Come on" to encourage action (e.g., Đi thôi nào! - Let's go!).
• "Any" or "Every": Nào can also mean "any" or "every". For example, [Noun] + nào + cũng means "every" (e.g., người nào cũng - everyone), [Noun] + nào + cũng được means "any/whichever", and không + [Verb] + [Noun] + nào means "not any".
• "Some" or "A Certain": When combined with đó, it forms an indefinite phrase meaning "some" or "a certain". For example, một ngày nào đó (some day) or người nào đó (a certain person).
• Emphatic Negation: Placed before a verb, nào can act as a strong denial or rebuttal, meaning "not at all" (e.g., Tôi nào có biết! - I didn't know at all!).
• Nào ... nấy: This paired structure means "whichever... that one" or "like..., like..." (e.g., người nào việc nấy - each person to their own task).
• Nào là: Used to list multiple items, emphasizing abundance (e.g., Trên bàn có nào là sách, nào là vở - On the table there are books, notebooks, and so on).