Past participles have which uses in Spanish? A. Used with haber to describe an action that has happened

B. Used to form the passive voice with ser

C. Combined with estar as an adjective

D. All of the above

A. Used haber to describe an action that has happened.

In Spanish, past participles are words or phrases that either end with -ido or -ado. Past participles describe something that already happened. The way this is done is by taking the ending words of a phrase, which can be -ar, -er, or -ir, and replace these with either -ido or -ado, then this is now a past participle. So I think that the correct answer is A.

Explanation:

Hope this helps =)