-ED sounds like D
(Past Tense Verbs & Adjectives)
Reading & Pronunciation
With regular verbs, -ED is used to form the past tense. It's also used to create the past participle (V3) which also gets used as an adjective.
A lot of students mistakenly think that this -ED ending adds an extra syllable. However, -ED actually only adds an extra syllable in a few cases. The majority of time, it creates a sound that gets blended into the consonant which comes before it.
Voiced Consonants
Voiced consonants are the ones where your vocal chords vibrate while making the sound:
b, v, g, z, ʤ (j), ð (voiced th), l, m, n, r
Here, the -ED is pronounced like -D.
The -D blends into the preceding consonant. It doesn’t create a syllable.
Examples: moved, stayed, studied, married, raised, engaged, travelled
Practice these sounds
You can listen to words with this sound on my Memrise course here. Practice saying the sound in isolation. Consider doing this activity to get used to saying it while speaking.