他失手杀了她英语怎么说

如果你要用英文来描述一个人在不小心的情况下杀死了另一个人，你可以说"he accidentally killed her"，这句话的来源是来自于英文动词"to kill"，表示"杀死"的意思，加上副词"accidentally"表示"不小心地"。例如：
He accidentally killed her while they were playing with a gun.
他们在玩枪时不小心杀了她。
The driver accidentally killed the pedestrian when he lost control of the car.
当司机失去汽车控制时，他不小心撞死了行人。
The hunter accidentally killed his friend while they were out hunting.
猎人在打猎时不小心杀死了他的朋友。