Mandarin Question Words: the Answer's Seat
English builds a question by demolition: it grabs the wh-word, drags it to the front, and rearranges what is left ('You want WHAT?' becomes 'WHAT do you want?'). Mandarin does none of that. A Mandarin question is the statement, untouched, with a question word parked in the seat where the answer will sit. Learn the statement and the question comes free.
- 他是我朋友。(Tā shì wǒ péngyou.) - He is my friend.
- 他是谁?(Tā shì shéi?) - Who is he?
谁 (shéi) sits exactly where 我朋友 (wǒ péngyou) sat. That one principle covers the whole family.
The set
- (shénme) - what. 你想吃什么?(Nǐ xiǎng chī shénme?) - What do you want to eat? The answer, 东西 (dōngxi, something) or anything else, will occupy the same slot.
- (shéi) - who. 这些东西是谁的?(Zhèxiē dōngxi shì shéi de?) - Whose are these things? Also pronounced shuí in careful speech; shéi is what you will hear.
- (nǎ) - which. Behaves like 这 (zhè) and 那 (nà): it needs a measure word before a noun. 哪个人?(Nǎge rén?) - Which person? Never bare 哪人 (nǎ rén).
- (nǎr) - where. The place-word: 你的朋友在哪儿?(Nǐ de péngyou zài nǎr?) - Where is your friend? Southern speakers say 哪里 (nǎlǐ); same word, same slot.
- (zěnme) - how. Sits before the verb: 这个东西怎么用?(Zhège dōngxi zěnme yòng?) - How do you use this thing?
- (wèishénme) - why. Literally 'for what'. 你为什么不去?(Nǐ wèishénme bú qù?) - Why aren't you going? The answer starts with 因为 (yīnwèi, because).
- (jǐ) and (duōshao) - how many, how much. The pair that deserves its own section.
几 (jǐ) vs 多少 (duōshao)
Both ask about quantity; they split the territory by size and by grammar.
几 (jǐ) expects a smallish answer, usually under ten, and it MUST take a measure word, exactly as a number would: 你有几个孩子?(Nǐ yǒu jǐ ge háizi?) - How many children do you have? 你去几天?(Nǐ qù jǐ tiān?) - How many days are you going for?
多少 (duōshao) is size-agnostic and attaches straight to the noun, no measure word required: 这里有多少人?(Zhèlǐ yǒu duōshao rén?) - How many people are here? And the question you will ask most in your first week in China: 这个多少钱?(Zhège duōshao qián?) - How much is this? A price is always 多少钱 (duōshao qián), never 几钱 (jǐ qián).
The quick test: if you would be surprised by an answer over ten, and a measure word fits, use 几 (jǐ). Otherwise 多少 (duōshao) is never wrong.
No 吗 (ma), and no fronting
Two errors to head off. First, a question word already makes the sentence a question, so 吗 (ma) stays off the end: 你想吃什么?(Nǐ xiǎng chī shénme?), not 你想吃什么吗 (nǐ xiǎng chī shénme ma). Second, resist the English reflex to front the question word: 什么你想吃 (shénme nǐ xiǎng chī) is not Mandarin. Say the statement, swap in the question word, stop. The question word sits in the answer's seat, and the answer will sit right back down in it.