老(ろう)婦(ふ)人(じん) roufujinが ga渡(わた)る() wataruの noを o助(たす)け()た() tasuketa。 I helped the elderly woman cross. Literal Elderly-woman [subject-が] cross [nominalizer-の] [object-を] helped. ~のを助ける ('to help someone do X') nominalizes the action with の and marks it as the object of 助ける. The subject doing the helping is omitted. etiquettenominalizer の
老(ろう)婦(ふ)人(じん) roufujinが ga渡(わた)る() wataruの noを o助(たす)け()た() tasuketa。 I helped the elderly woman cross. Literal Elderly-woman [subject-が] cross [nominalizer-の] [object-を] helped. ~のを助ける ('to help someone do X') nominalizes the action with の and marks it as the object of 助ける. The subject doing the helping is omitted. etiquettenominalizer の