例句：
Her father will have been dead for 10 years by Octobor this year.
到今年十月份，她的父亲已经去世10年了。
Had he been taken to the hospital in time, he would have been dead!
要不是被及时被及时送到医院，他早就死了。
I'm conducting an investigation, but all my leads have been dead ends.
我说，“我展开了调查，可是所有的线索都没有结果。”
The Mesopotamian civilisations, not matter how long ago they started, have been dead for a long time.
不管两河文明起源于多久，很久就已经消亡了。