正反问句

**What it means:** A 正反问句 places the positive form and negative form of a verb or adjective side by side to ask a yes/no question. It literally mirrors both possibilities at once.

**Two main patterns:** 1. V + 不 + V — for present/future/habitual: 你来不来？ 你喜不喜欢？ 天气冷不冷？ 2. V + 没 + V — for asking whether a past action happened: 他去没去学校？ 你吃没吃早饭？

**For adjectives:** Adj + 不 + Adj: 今天冷不冷？ 这个好不好？

**For 是:** 是不是 is commonly used and sounds very natural: 你是不是学生？

**When to use:** - In spoken Chinese when you want to sound natural and casual. - To ask whether a past event happened (V没V). - To ask about current state, habit, or intention (V不V).

**When NOT to use:** - NEVER add 吗 to a 正反问句 — this is the top learner error: 你去不去吗？ is WRONG. - Do NOT use the full verb in the second position for two-syllable verbs — just repeat the key character: 喜欢不喜欢 → acceptable, but 喜不喜欢 is more colloquial.

**Comparison with 吗 question:** - 你累吗？ and 你累不累？ mean the same thing. - A-not-A sounds more natural in spoken Chinese. - 吗 questions are slightly more formal or written.

**Answering:** Just say the verb: 来 (yes) or 不来 (no). For V没V: 去了 or 没去.