Explanation
The past simple tense and past participle of all regular verbs end in -(e)d. The –(e)d ending has three different pronunciations: / id /, / d / and / t /.
1. We pronounce the –(e)d /id / when the infinitive of the verb ends in a /t / or / d /.
2. We pronounce the –(e)d / t / when the infinitive of the verb ends in a voiceless sound (except / t /), for example, / p, s, k, f /...
3. We pronounce the –(e)d / d / when the infinitive of the verb ends in a voiced sound (except / d/), for example, / b, g, l, z, v, d, m, n /...
