吧 (ba) — suggestion and assumption particle

吧 (ba)

吧 is a sentence-final particle with two main uses: making a soft suggestion ("let's...") and expressing a tentative assumption or seeking confirmation ("I suppose... right?").

Meanings

1. [particle] Suggestion softener: turns a statement into a gentle proposal (let's go, shall we?).
2. [particle] Assumption marker: expresses that the speaker assumes something is true and seeks confirmation.

Example Sentences

我们走吧！ Wǒmen zǒu ba! Let's go!

你是学生吧？ Nǐ shì xuésheng ba? You are a student, right?

这个东西很贵吧？ Zhège dōngxi hěn guì ba? This must be quite expensive, right?

坐吧，不用客气。 Zuò ba, bù yòng kèqi. Please sit down, there is no need to be polite.

Usage Notes

吧 softens the tone of whatever precedes it. In the suggestion sense (我们走吧, Let's go), it is equivalent to "shall we" or "let's" and invites the other person to agree. In the assumption sense (你是学生吧), it means the speaker already believes the statement is true but is looking for confirmation — the tone is like "...right?" or "I take it that...". This is different from 吗, which is a genuine open yes/no question with no assumed answer. 吧 can also soften a command into a polite request.

Collocations or Common Phrases

Memory Hook

吧 looks like a bar (酒吧) — at the end of the sentence it is like a bar stool invitation: "sit down, won't you?"