Which is an example of irregular verb in past participle form?

Here's an example of an irregular verb in the past participle form:

* Spoken

Here's why:

* Regular verbs form their past participles by adding "-ed" (e.g., walk - walked, play - played).

* Irregular verbs have unique, often unpredictable past participle forms. "Spoken" is the past participle of the irregular verb "speak".

Let me know if you'd like more examples!