Many Spanish speakers find it hard to pronounce the past and past participle of regular verbs in English. It is is quite easy tough.
The sounds in this lesson are presented in a figurative way, especially designed for native Spanish speakers, not according to IPA standards or any other phonetic system.
general rule → /t/ & /d/
Regular verbs in English form the past and past participle by adding —ED to the present form.
The pronunciation is either a /T/ or a /D/. You just need to add any of these sounds to the pronunciation of the present form.
You can not choose if the pronunciation is a /T/ or a /D/, each verb has a different pronunciation but /T/ & /D/ sounds are very similar and you shouldn’t care for now. The only important thing is to never pronounce the /E/, which is always silent.
the exception → /id/
When the present form already end in a /T/ or /D/ sound, we cannot make the pronunciation by adding /T/ or /D/ because it would be impossible to pronounce.
When the present ends in a /T/ or /D/ sound, the correct pronunciation is /ID/.
Keep in mind that we are talking about about pronunciation here not about spelling. It doesn’t matter how you write the verb in the present but how you say it.
Also, remember that is only pronounced /ID/ if the present form ends in a /T/ or /D/ sound. It is hard for Spanish speakers to pronounce, for example, /K/ + /T/ but it isn’t in English and it follows the general rule.