You can see your big sister and the dog's shadows.
Look, there's a shadow from your sister and the dog.
この場合、次のような言い方ができますよ。
ーYou can see your big sister and the dog's shadows.
「お姉ちゃんと犬の影が見えるね」
ーLook, there's a shadow from your sister and the dog.
「見て、お姉ちゃんと犬の影があるよ」
ご参考まで！
カナダ 
