Participial Adjective vs. Passive Voice

Participial Adjective: an adjective made from a past participle: I was tired.

Passive Voice: the action is done to the subject: The window was broken by the ball.

Note: Both use the verb to be and a past participle (tired, broken, etc.), but are not the same.

Feature	Participial Adjective	Passive Construction
Grammatical Role*	Predicate adjective	Passive verb phrase
Main Verb Type*	Linking verb (be)	Passive auxiliary be + V3
Describes*	State or condition	Action done to the subject
Agent possible?*	No (usually)	Yes (often with by-phrase)
Replacement with seem / feel	Yes (I felt tired)	No unless poetic

Diagnostic Tests

1. Substitution with “seem” or “feel”
   • I was tired → I felt tired ✅
   • I was broken by grief → I felt broken by grief ❌ (awkward unless metaphorical)
2. Agent Phrase Test
   • I was tired by the long walk ❌ (ungrammatical)
   • I was broken by the fall ✅ (passive with agent)
3. Question Form Test
   • Why were you tired? → asks about a state
   • Why were you broken? → asks about an event or cause —

Philosophical or Literary Use

Sometimes, the line blurs—especially in poetic or metaphorical language:

• I was broken by grief might feel stative, but grammatically it’s passive.
• I was exhausted is clearly adjectival, even though exhausted is a participle.