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is he ill vs is he being ill — state vs behaviour (GiU Unit 4)

Why isn’t Steve at work today? Is he ill? ✓ (✗ Is he being ill)

adjective type form meaning
state (ill, tired, sad, hungry, tall, old) simple present how he is
behaviour (rude, silly, selfish, difficult, kind, polite) continuous OK how he’s acting right now
  • Is he ill? = does he have an illness (state) ✓
  • Is he being ill? — ✗ nonsense: being + adj = acting/pretending to be that way
  • He’s being rude = acting rudely (and he isn’t usually) ✓
  • He’s rude = that’s his character (permanent)

be being + adjective only works if you can act the adjective. You can act rude/silly/selfish/nice; you can’t act ill/tall/old/dead.

  • ✓ He’s being difficult / polite / childish
  • ✗ He’s being ill / tall / thirty

States (have a cold, have a headache) → simple/have got, never continuous (see have-got-vs-have). Actions (having lunch, having a good time) → continuous fine. One engine: states resist the continuous; actions/behaviour take it.

Raymond Murphy, English Grammar in Use, Unit 4 — Present continuous and present simple 2. Ebot lesson 2026-09-05.