该

• Pinyin: gāi
• Hanzi breakdown: 该 = 讠(speech radical) + 亥 (phonetic component) — originally related to speech obligations

Meaning

Should; ought to. Indicates that something is expected or appropriate to do.

A very high-frequency auxiliary verb expressing obligation, expectation, or what is fitting. Similar to 应该 but slightly more colloquial. Can also express that it is someone's turn (该你了 = it's your turn).

Examples

1. 天晚了，我们该回家了。 It's getting late — we should head home.
2. 这件事我该怎么办？ What should I do about this?
3. 该你了，轮到你说了。 It's your turn — go ahead and speak.

Usage Guide

Context: advice, daily decisions, turn-taking

Tone: advisory

Do Say

• 我们该走了。(We should get going.)
• 该吃饭了，别玩手机了。(It's time to eat — stop playing with your phone.)

Don't Say

• 在非常正式的写作中，用'应该'代替'该' — 该 is slightly more colloquial; for formal writing or speeches, 应该 is more appropriate.

Origin & History

Ancient Chinese character originally meaning 'to be one's due' or 'to owe.' Over time it developed the modal auxiliary sense of 'should' or 'ought to.'

Cultural Context

Generation: All ages

Social background: Universal