一、whoever的意思“任何…的人”,在意义上大致相当于 anybody who。Whoever可引导名词性从句,在从句中可用作主语或宾语,例如:
1. I’ll take whoever wants to go.
谁想去我就带谁去。
2. She can marry whoever she chooses.
她愿意嫁谁就嫁谁。
3. Whoever wants the book may have it.
任何人要这书都可拿去。
4. Whoever comes will be welcome.
谁来都欢迎。
5. Whoever you invite will be welcome.
任何你邀请的人都欢迎。
6. Whoever breaks this law deserves a fine.
违反本法者应予以罚款。
7. I’ll give the ticket to whoever wants it.
请想要这票,我就把它给谁。
8. The police, or whoever, would not think of looking for him here.
无论是警方还是其他什么人都不会想到来这里找他。
9. You can have whoever you like to visit you.
你想要谁来拜访你都可以。
10. Whoever was waiting for them there had command of the situation.
在那边等候他们的人控制了局势。

二、whoever 和no matter who 的意思都是无论谁,不管谁的意思.
但whoever可以作为引导让步状语从句的连接代词,而no matter who 不能.
whoever和no matter who 是疑问词 + ever和no matter + 疑问词中的一个特例,这类词的主要区别是:
1. 疑问词 + ever可引导名词性从句,在主从句中要充当一定的部分.如:
Whoever breaks the rule must be punished.
无论谁不遵守规则都必须被处罚。
2.疑问词 + ever还可引导让步状语从句.如:
Whoever breaks the rule,he must be punished.
无论谁不遵守规则,他必须被处罚。
3.no matter + 疑问词只能引导让步状语从句.如:
No matter who breaks the rule,he must be punished.
无论谁不遵守规则,他必须被处罚。