Past tense of regular verbs

There are three possible ways to pronounce regular verbs in the simple past tense. 1) Verbs that end in a voiceless sound. (Remember we are talking about sounds, not letters.) ==> /t/ Examples: Helped Kissed Finished Looked Walked Washed Danced Roughed Fixed Faced Touched Chopped Parked 2) Verbs that end in a voiced sound. ==> /d/ Examples: Loved Realized Cleaned Claimed Stunned Called Rolled Buzzed Bobbed Gagged Slammed Stirred Fired 3) Verbs ending in “t” or “d” sounds ==> /əd/ Examples: Wanted Hunted Needed Ended Audited Trotted Seeded Parted Patted