Is crowded a participle in this sentence? "The house was crowded."
The house was crowded.
No, "crowded" is an adjective, not a verb participle. We can tell it's an adjective by applying certain tests:
1. It can be modified by "very", which can modify adjectives but not verbs: "The house was very crowded".
2. It can occur as complement to a complex-intransitive verbs like "become": "The house became crowded".
3. It can occur as complement to a complex-transitive verbs like "make": "The guests made the house crowded".
"Crowded" clearly has the properties of indisputable adjectives and hence must belong in that class.
Is that okay?