没 vs 不会 (méi vs búhuì): past denial vs future impossibility
Both 没 (méi) and 不会 (búhuì) can translate to 'didn't' or 'won't' in English, but they apply to different time frames: 没 denies that something happened in the past, while 不会 denies that something will happen in the future or expresses impossibility. Misusing them can confuse whether an event has already occurred or is yet to come.
没 (méi) is the primary negator for past events or completed actions. It cannot be used together with the perfective particle 了 because 没 already indicates that the action did not occur. 不会 (búhuì) combines 不 (not) and 会 (will/know how) to negate future events or learned ability. The key distinction is time: 没 refers to the past, while 不会 refers to the future or general impossibility. Knowing this helps avoid English-like confusion.
When to use each
Use 没 to deny that an event happened in the past or that a change of state was completed. It is the standard negator for past actions. For example, to say 'I didn't go' or 'He didn't eat', use 没. Note that the perfective particle 了 is never used after a verb negated by 没.
While 没 primarily negates past events, it can also negate the completion of an action regardless of tense, but in practice it's most common for past. Additionally, 没 negates the verb 有 (to have) to mean 'not have' (e.g., 我没有钱).
Use 不会 to indicate that something will not happen in the future, or to express that something is impossible. It combines 不 and 会. For example, to say 'it won't rain tomorrow' or 'I can't come' (due to inability or future contingency), use 不会. It also negates learned ability (e.g., 'I can't speak Japanese').
When negating ability, 不会 means 'cannot because not learned'; for inability due to external obstacles, use 不能. In the comparison with 没, the focus is on future negation, not ability.
At a glance
| 没 | 不会 | |
|---|---|---|
| Time frame | Past events | Future events or possibility |
| Co-occurrence with 了 | Never used together with 了 (了 is dropped) | Not applicable (not used for past perfective) |
| Common structure with time word | Time word + subject + 没 + verb (e.g., 昨天我没去) | Time word + subject + 不会 + verb (e.g., 明天我不会去) |
| Negation of 有 | 没 is used to negate 有 (to have), forming 没有 | 不会 does not negate 有; use 没有 for 'don't have' |
Examples
- 没昨天我没去学校。Zuótiān wǒ méi qù xuéxiào.I didn't go to school yesterday.了 is not used after 去 because 没 negates the past event.
- 不会明天我不会去学校。Míngtiān wǒ búhuì qù xuéxiào.I won't go to school tomorrow.Future time word 明天 appears at the beginning.
- 没他没吃早饭。Tā méi chī zǎofàn.He didn't eat breakfast.No 了 after 吃.
- 不会他不会来。Tā búhuì lái.He won't come.Implies future or general impossibility.
- 没✗我没去了学校。Wǒ méi qùle xuéxiào.(Incorrect) I didn't go to school.错误: 了 cannot be used with 没. Correct: 我没去学校。
Common mistakes
- Using 没 for future events: e.g., '明天我没去' should be '明天我不会去'.
- Using 不会 for past events: e.g., '昨天我不会去' should be '昨天我没去'.
- Including 了 after the verb with 没: e.g., '我没去了' is wrong; correct is '我没去'.
- Incorrect word order: e.g., '我不会去明天' should be '明天我不会去'; '他没去昨天' should be '昨天他没去'.
FAQ
- When do I use 没 vs 不会?
- Use 没 for actions that didn't happen in the past (e.g., 昨天我没去). Use 不会 for actions that won't happen in the future or are impossible (e.g., 明天我不会去). The time frame is the key dividing line.
- Can 没 be used for future events?
- No, 没 is only for past events or completed actions. To negate the future, use 不会 or 不 (for habits/general statements). For example, '明天我不去' (I'm not going tomorrow) or '明天我不会去' (I won't go tomorrow).
- Why is there no 了 after the verb when using 没?
- The particle 了 indicates perfective aspect (completion). Since 没 already shows the action did not happen, adding 了 would be contradictory. Therefore 没 and 了 cannot appear together in the same verb phrase.
- Is 不会 the same as 不能?
- Not exactly. 不会 often means 'won't' (future) or 'can't due to lack of knowledge/skill'. 不能 means 'cannot due to external constraints or rules'. For future negation of actions, 不会 is more natural unless there's an explicit obstacle.