吗 vs 吧: what is the difference?
吗 asks a neutral yes-or-no question. 吧 guesses and expects yes, or softens a request. 你是老师吗 asks; 你是老师吧 means 'you are a teacher, I suppose'.
| Word | Pinyin | What it does | Structure |
|---|---|---|---|
| 吗 | ma | Asks a neutral yes-or-no question and does not guess the answer. | Statement + 吗？ |
| 吧 | ba | Makes a suggestion or a guess that expects agreement. | Sentence + 吧 |
吗 (ma)
Asks a neutral yes-or-no question and does not guess the answer.
Structure: Statement + 吗？
| Chinese | Pinyin | English |
|---|---|---|
| 你明天有空吗？ | Nǐ míng tiān yǒu kòng ma? | Are you free tomorrow? |
| 你们学校大吗？ | Nǐ men xué xiào dà ma? | Is your school big? |
| 这是你的书包吗？ | Zhè shì nǐ de shū bāo ma? | Is this your schoolbag? |
Not: 你去不去吗？ 吗 does not go with the A-not-A form. Say 你去不去？ or 你去吗？
吧 (ba)
Makes a suggestion or a guess that expects agreement.
Structure: Sentence + 吧
| Chinese | Pinyin | English |
|---|---|---|
| 来吧，别客气。 | Lái ba, bié kè qi. | Come on, do not be shy. |
| 你不是学生吧？ | Nǐ bú shì xué sheng ba? | You are not a student, are you? |
| 这个周末你有空吧？ | Zhè gè zhōu mò nǐ yǒu kòng ba? | You are free this weekend, right? |
Not: 你是不是老师吧？ 吧 already guesses, so drop it after 是不是.
Where this comes from
The comparison is part of Sentence-final Particles: 啊、吧、的 (HSK 2) in the grammar reference, which has the full explanation, more worked examples, and what to learn before and after it.
More pairs: 次 vs 遍 · 刚 vs 刚才 · 更 vs 还 · 还 vs 已经 · 看见 vs 看到 · 可以 vs 能 · 吗 vs 是不是 · 如果 vs 只要 · 上去 vs 上来 · 往 vs 向 · 有点儿 vs 一点儿 · 又 vs 再 · all 81 pairs.
Frequently asked questions
What is the difference between 吗 and 吧?
吗 asks a neutral yes-or-no question. 吧 guesses and expects yes, or softens a request. 你是老师吗 asks; 你是老师吧 means 'you are a teacher, I suppose'.
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