Topic summary
Past participle

Extracted from the Wikipedia article Participle.
Early English
In Old English, past participles of Germanic strong verbs were marked with a ġe- prefix, a West Germanic feature still found in most strong and weak past participles in Dutch and German today, and often by a vowel change in the stem. Those of weak verbs were marked by the ending -d, with or without an epenthetic vowel before it. Modern English past participles derive from these forms (although the ġe- prefix, which became y- in Middle English, has now been lost — except in some rare dialects such as the Dorset dialect, where it takes the form of a-).