Pronunciation is very difficult because many words are not pronounced the same way they are spelled.
Words ending in "ed" (both past tense verbs and adjectives) can be pronounced 3 different ways:
1. The final sound is pronounced “t” after the sounds f, k, p, s, ch, and sh
Example: laughed, raced
m, n, r,th, j, ng, v, z and all vowel sounds.
Example: judged, banged
3. The final sound is pronounced “ed” after the sounds t and d.
Where do these words go?
We use "S" for plural nouns and present tense verbs for he, she, and it. Here are the rules for pronouncing "S."
Use “s” for words ending in the sounds of f, k, p, t
Example: Laughs, Books, Tops
Use “iz” for words ending in the sounds of sh, ch, s, and z
Example: Brushes, Catches, Noses
Use “z” for words ending in the sounds of b, d, g, l, m, n, r, v, and all vowels (a, e, i, o, u)
Example: Tubs, Bugs, Tears, Snows, Eyes
I'm sorry that English is such a crazy language!