Past tense -ed resulting in extra syllable: When the verb ends in /t/ or /d/, the past tense suffix is pronounced as an extra syllable as in wanted, faded, and shouted.

Voiced past tense -ed: When the final sound of the verb is voiced, the past tense suffix is voiced as in booed, seemed, cried, and stirred.

Unvoiced past tense -ed: When the final sound of the verb is unvoiced, the past tense suffix is unvoiced as in waxed, faked, worked, and mopped.

Voiced plural /z/: When the final sound in the noun is voiced, the plural suffix is voiced as in words, times, pencils, and shoes.

Unvoiced plural /s/: When the final sound in the noun is unvoiced, the plural suffix is unvoiced as in cakes, plants, and cats.

Extra syllable plural /-ez/: When the last sound in the noun is 'tch', 'ch', soft 'g', 's', or 'z' (and probably some others that I can't think of at the moment), the plural suffix is pronounced as an extra syllable as in couches, churches, matches, garages, and classes.