I was extremely(terribly)(so)sorry to hear of the death of . . .We have just heard(learned)with profound sorrow(regret)the sad news .… …感到无比沮丧。谨向您和您一家人表示最深切的吊慰(在您悲伤的时刻我们对您深表同情)。I wish there was something I could say or do to soften your grief(to help you) ......