This document discusses the three different pronunciations of the "-ed" ending on regular past tense verbs in English. It states that "-ed" is pronounced as /t/ when the verb stem ends in a voiceless sound, as /d/ when the verb stem ends in a voiced sound, and as /ɪd/ when the verb stem ends in /t/ or /d/. Examples are provided to illustrate each rule, such as "watched", "loved", and "wanted" respectively. The purpose is to explain the different ways of pronouncing the regular past tense "-ed" ending in English.