Relacionar Columnas Brown’s MLU stagesVersión en línea Test yourself on Brown’s research on morphological acquisition by matching pairs of morphemes with the month age of mastery. por Som Person 1 Possessive ‘s’ 2 Regular third person 3 Irregular past 4 Regular past 5 Present progressive 6 Regular plural 19-28 26-48 26-40 28-50 25-46 27-33 1 Early III 2 Early II 3 Late I 4 Late II 5 Late III 6 Early I 31-32 12-22 28-30 22-26 27-28 33-34