年老いている
Our dog is old.
私たちの犬は年老いています
Our dog is old now.
私たちの犬はもう年老いています
Our dog is old now because he is fifteen.
私たちの犬はもう十五歳なので年老いています
Our dog is old now because he is fifteen and his fur has turned white.
私たちの犬はもう十五歳なので毛が白くなって年老いています
Our dog is older than before because he is fifteen and his fur has turned white.
私たちの犬はもう十五歳なので毛が白くなって以前より年老いています