-ed pronunciation.

1. Use /t/ after unvoiced final sounds f, k, p, s, tß (ch), ß (sh), † (th)

look - looked (t) push - pushed (t)
ask - asked (t) watch - watched (t)
help - helped(t) dress - dressed (t)

2. Use /d/ after voiced final sounds b, g, Ω(j), l, m, n, ˜, r, ∂(th), v, z, + vowels

sob - sobbed (d) roam - roamed (d)
believe - believed (d) judge - judged (d)
fill - filled (d) enjoy - enjoyed (d)

3. Use / d/ after final /d/ and /t/ .

**/d/ adds an extra syllable
need - needed (d)
wait – waited (d)