Irregular Verbs and Past Participles

Every sentence has a least one verb.
Some sentences have a verb which "helps" the main verb.
These helping verbs include words such as have, had, and has.
A helping verb comes before the main verb and sometimes changes the form of the main verb and is used to form the perfect verb tenses ("I have sung in a choir").

Below there are some quotes which incorporate the perfect verb tenses.

Examples and Explanations:

So they gathered them and filled twelve baskets with the pieces of the five barley loaves left over by those who had eaten. John 6:13
Had is the indicator. It tells you to use the past participle form of the verb: had eaten.

Therefore, if anyone is in Christ, the new creation has come: The old has gone,
the new is here! 2 Cor. 5:17
Here, come is the past participle form of the verb. Come is the present tense form and also the past participle form of the verb. This happens with some verbs. The past participle indicator is has in both cases here (has come; has gone), and they are followed by the past participles: came and gone.

O God, you know my folly; the wrongs I have done are not hidden from you.
Psalm 69:15
Did is the simple past tense.
The helper verb have is correctly used with the past participle done.

And when they had sung a hymn, they went out to the Mount of Olives. Mark 14:26
Had is the helping verb used here, and leads you to use the past participle form sung.

...and said to him, "Everyone serves the good wine first, and when people have drunk freely, then the poor wine. But you have kept the good wine until now. John 2:10
The helping verb have, is used with the past participles: drunk and kept.

A list of irregular verbs: