The 3 pronunciations of the '-s' of plural nouns (and 3rd person singular for verbs) depend on the final sound of the noun (or verb). ]): vases, sizes, wishes, watches, judges, barrages /s/ follows the voiceless consonant sounds 9except those above: cakes, laughs, maps, hats, smiths /z/ follows all the other sounds—voiced consonants, vowels, liquids and nasals: bags, loves, tubs, heads, plays, sighs, stars, beans.
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