該...(就)(得)... expresses obligation or appropriateness.
Should do
Often with 就/得
See examples below for varied real-world usage.
Obligation/appropriateness
- ✅ 該做就做。
- ❌ 該做就不做。（語氣矛盾）
Not for past facts
- ✅ 該說就說。
- ❌ 該說就說了。（語境需對）
When you should rest, you must rest, do not force yourself.
Issues that should be solved must be solved.
Processes that should change must change, no delay.
If apology is due, you must apologize.
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