Comparing "cai" and "jiu"

Both 才 and 就 are adverbs that have to do with expressing time, and they are both placed in front of the verb. However, they both have a different tone and feel, and they express different lengths of time.

才

才 expresses that the speaker thinks that the the time that passed since the action takes place was a long time. Sometimes it expresses anxiety, impatience, anger etc.

Structure

才 + Verb

Examples

• 我 等 了 两 个 小时 才 买 到 票。
• 他 迟到 了 半 个 小时 才 来。

就

就　expresses that the speaker thinks that the time since the action happened is short, and it has a surprise, unexpectedness, or even sometimes regret.

Structure

就 + Verb

Examples

• 你们 这么 早 就 下班 了？
• 他 两 年 以前 就 去世 了。

就 is used to express earliness

就 indicates that something has occurred earlier than expected

Structure

Subject + Time + 就 + Verb + Object

Examples

• 他 下午 四点 就 吃 晚饭。

Example dialog

• A: 你 怎么 才 来？
• B: 我 八点 就 出门 了，路 上 堵车 我 也 没 办法。

See also

• Expressing lateness with "cai"
• Expressing earliness with "jiu"