Here's how it works:
* Regular Verbs: The past participle of a regular verb is formed by adding "-ed" to the base form. For example:
* Base form: Walk
* Past participle: Walked
* Irregular Verbs: Irregular verbs have different past participles. These have to be learned individually. For example:
* Base form: Go
* Past participle: Gone
* Use in Sentences:
* Perfect Tenses: "I have walked to the store." (present perfect)
* Passive Voice: "The letter was written by her."
Remember: The past participle is not the same as the past tense. The past tense describes an action that happened in the past, while the past participle is used in different grammatical constructions.