Pronounciation of final ed

Hi,
can anyone help me. I need to know what the rules are for the pronounciation of thfinal 'ed' in past tense verbs are. I have no idea what to look for on the internet, I have tried serch engines but have had no luck.
Thankyou. Megan.

[izabela]

Hi,

There are three different ways of pronuncing -ed ending and it differs based on a sound right before the -ed ending.

Voiceless sounds makes the -ed sound like /t/ ex. past of 'walk', where 'k' is voiceless, ''walked' sounds /walkt/. Other voiceless sounds, which produce /t/ sounding ending of -ed, are: p, f, th (the voicelss one), ch, sh, s.

There are two voiceless letters, t and d, though, which make the -ed sound like /Id/ with the additional vowel sound, ex. 'started' is pronunced /startId/, where this additional vowel 'I' sounds like the letter 'i' in 'did'. other examples: sounded, intended, etc.

Voiced letters, or sounds, make the ed sound like /d/ ex. showed, where 'w' is voiced, sounds like /showd/.

I hope this helps,
Izabela