这两个形容词都有“死”之意。
dead : 指已停止呼吸和心脏跳动，与alive（活着的、活的）相对。
- She's been dead for 20 years now.
到现在她已经去世20年了。 - The motorcyclist was dead on arrival at the hospital.
那位摩托车手被送到医院时已经死亡。 - He was shot dead (= killed by shooting) outside his home.
他在家门外被人开枪打死了。
dying : 指奄奄一息，行将死亡。
- She nursed her dying husband for months.
她照料了病入膏肓的丈夫好几个月。 - Beethoven's dying words are said to have been "I shall hear in heaven."
据说贝多芬的临终遗言是“我会在天堂听到”。
