sadly不能说是第几人称,因为它是副词。
adv. 悲哀地悲痛地Sadly, bamboo plants die after flowering.
令人遗憾的是,竹子开花后就会死亡。
Sadly, both he and my mother died of cancer.
令人悲伤的是,他和我母亲都死于癌症。
Sadly when the lid of the boot sprang open, it was empty.
可惜,当后备箱盖弹开时,里面是空的。
Sadly, after eight years of marriage they had grown apart.
不幸的是,结婚八年后,他们的感情日渐淡漠了。