Morphology: rules pertaining to words e.g., add -ed to form the past tense.Originally Posted by SLRomero
Phonology: rules pertainging to sounds e.g., pronounce -ed as [d] after voiced sounds, as [t] after voiceless sounds:
tanned = tanne[d]
walked = walke[t]
Note, sink, sank sunk are irregular in form. That is, -ed is not added: *sinked. Note also, -i-, -a-, -u- occur in the same phonological environment: between [s] and [n]. They are fixed sounds: -i- doesn't change to -a- or -u-.
Morphology: (hypothetical word) frink (Present). What's the Past? frank, frunk. Notice that -i-, -a-, -u- follow a morphological pattern: -i- for Present and -a-, -u- for Past.
All the best, :D