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 Regular third person 2 Irregular past 3 Present progressive 4 Regular past 5 Possessive ‘s’ 6 Regular plural 26-40 26-48 25-46 19-28 28-50 27-33 1 Late II 2 Early I 3 Late III 4 Early II 5 Early III 6 Late I 28-30 12-22 22-26 27-28 31-32 33-34