whoever

1. Whoever commits the crime shall be sentenced to ten years in prison.
   任何人犯了此罪就要被判处十年徒刑。
2. Whoever told you that was lying.
   谁对你说这话，谁就在说谎。
3. Whoever can that be at the door?
   在门口的究竟是谁呢？

who.ev.er

pron.（代词）
Whatever person or persons:
无论谁：无论什么样的人或人们：
例句：
Whoever comes will be welcomed.
无论谁来都会受到欢迎

Who:
谁：
例句：
Whoever could have dreamed of such a thingôSee Usage Note at whatever ,who
谁会想到这种事呢ô参见 whatever,who