妹(いもうと) imoutoは wa一(いち)人(にん)で() ichinindeエアロビクス earobikusuクラス kurasuに ni行(い)け()る() ikeru年(ねん)齢(れい) nenreiだ da。 My sister is old enough to go to aerobics class by herself. Literal Younger-sister [topic-は] alone aerobics-class [to-に] can-go age. 一人で ('by oneself') + 行ける (potential form of 行く) = 'can go alone.' 年齢だ ('is the age for') uses the copula to state she's at the right age. エアロビクスクラス is a katakana loanword compound. familysportspotential form (~える/~られる)
妹(いもうと) imoutoは wa一(いち)人(にん)で() ichinindeエアロビクス earobikusuクラス kurasuに ni行(い)け()る() ikeru年(ねん)齢(れい) nenreiだ da。 My sister is old enough to go to aerobics class by herself. Literal Younger-sister [topic-は] alone aerobics-class [to-に] can-go age. 一人で ('by oneself') + 行ける (potential form of 行く) = 'can go alone.' 年齢だ ('is the age for') uses the copula to state she's at the right age. エアロビクスクラス is a katakana loanword compound. familysportspotential form (~える/~られる)