Did you know these two letters can be
pronounced in three different ways?
They can be /d/, /t/ or /id/. Here's how to find out which.
First, feel your neck. If a sound makes it vibrate like /d/,
then it's voiced. If it doesn't like /t/, then it isn't.
Where 'ed' comes after a vowel or a voiced
consonant then pronounce it as /d/ -
which is a voiced sound.
Played, used.
If you have 'ed' after an unvoiced
sound then it sounds like /t/.
An unvoiced sound. Looked, helped.
If you have t or d then 'ed' becomes /id/ -
it's just easier to say. Wanted, needed.
So if 'ed' comes after a voiced sound,
then it's voiced. If it comes after an unvoiced
sound, then it's unvoiced and if it
comes after /t/ or /d/, then it's /id/.