Are auxiliary verbs used in forming the past participle?

Auxiliary verbs are not directly involved in forming the past participle. The past participle is a verb tense that typically denotes a completed or past action. It is commonly formed by adding "-ed" to the base verb, or in certain irregular verbs, following specific patterns or taking on unique forms. Auxiliary verbs, such as "have" or "be", are employed to form compound verb tenses, such as the present perfect or past perfect, but they do not play a direct role in the construction of the past participle itself.