Pronunciation of -ed in the Simple Past

How to pronounce -ed in the Simple Past

In the Simple Past we add -ed to regular verbs. Be careful pronuncing the verbs:

1. verbs ending in -ed preceded by a voiceless consonantt [p, k, f, ʃ, ʧ, s, θ] → speak [t].
The -e is silent.
Example: I stop – I stopped [stɒpt]

2. verbs ending in -ed preceded by a voiced consonant [b, g, v, ʒ, ʤ, z, ð, l, m, n] or a vowel → speak [d].
The -e is silent.
Example: I clean – I cleaned [kli:nd]

3. verbs ending in -ed preceded by [t] or [d] → speak [ɪd].
-e changes to [ɪ] (otherwise the ending could not be heard)
Example: I visit – I visited [vɪzɪtɪd]