大是大非

dàshì-dàfēi
idiom

Meanings

  1. 1 matters of fundamental right and wrong
  2. 2 issues of principle
  3. 3 major questions of truth vs. falsehood

Examples

HSK 6
Tā shì gè zài dàshì-dàfēi wèntí shàng lìchǎng jiāndìng de rén.
He's someone who stands firm on questions of principle.
HSK 7-9
Zài dàshì-dàfēi miànqián, bù néng hánhu.
On matters of fundamental right and wrong one cannot be vague.

Tips

usage
Structure: 大X大Y (big X big Y) pairs 是 ('right') with 非 ('wrong'). Reserved for serious moral/political issues - don't use for everyday disagreements. Often preceded by 在...面前 ('when facing') or 在...问题上 ('on questions of').

Stroke Order

大 dà
是 shì
非 fēi