The past participle of collapse is collapsed.
The past participle is used in the formation of the perfect tenses (present perfect, past perfect, and future perfect) and in passive voice constructions.
Here are some examples of how to use the past participle "collapsed":
- Present Perfect: The building has collapsed due to the earthquake.
- Past Perfect: The bridge had collapsed before the rescue team arrived.
- Future Perfect: By next year, the entire economy will have collapsed.
- Passive Voice: The bridge was collapsed by the flood.
