Stress-neutral suffixes

These suffixes never make any difference to the stress pattern of the resulting word. Such suffixes include all eight inflectional suffixes (plural; possessive; third person singular present tense -s; progressive -ing; past -ed; past participle -en/-ed; comparative -er; and superlative -est), and several derivational ones:

We should point out that the last item, adjective-forming suffix -y, should not be treated in the same way as the noun-forming -y, which shifts the stress to the antepenultimate, as in homophone – homophony , photography, etc.

While the above-listed suffixes do not normally change the location of the stress, when several unstressed syllables are piled up to the right of the stress, we see that the stress moves to the antepenult.

móment– mómentary but momentárily