✨ ベストアンサー ✨
ひと通り英語に直してみました
1 I had never had mutton until I visited Hokkaido.
2 Lily had been watching a movie for two hours when her mother came home.
3 The drama will have finished by the time Ryo arrives home.
4 I found I had left my smartphone on the bus.
遅れてすみません!
ありがとうございます!