Here are some examples of pronouns used in predicates:
Subject:
* She is a doctor.
* They went to the park.
Object:
* I met her yesterday.
* We gave the book to them.
Complement:
* It was he who won the race.
* The winner is she.
Note: In these examples, the pronouns are part of the predicate, but they are not specifically called "predicate pronouns." They are simply pronouns functioning as the subject, object, or complement within the predicate.