讲解一：
whoever 和no matter who 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.You can choose whatever you like in the shop.
②疑问词 + ever还可引导让步状语从句.如：Whoever breaks the rule,he must be punished,Whatever you do,you must do it well.
③no matter + 疑问词只能引导让步状语从句.如：No matter what you do,you must do it well.No matter who breaks the rule,he must be punished.
例题：-------has eyes can see --------- great achievements we have made since 1978.
A,Whoever;what B,No matter who; what
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.
则本题答案选A
翻译：不论谁,只要长着眼睛都能看得见从1978年以来我们取得的重大成就.
讲解二：
no matter who只能引导让步状语从句,且who在从句中充当主语.
状语从句是比较独立的成分,它相当于主句的一个原因状语而已.主句缺少它不太要紧,会依然是一个完整的句子.
此时,no matter who可以换写成whoever
如：I'll always love you no matter who you are.
= I'll always love you whoever you are.
而whoever除了和no matter who这一样的用法之外,还可以引导名词性从句.
no matter who没有此种用法,不能代用whoever.
而名词性从句不是独立成分,它充当主句中某一个不可缺少的成分,比如主语/宾语/表语等.
如果主句缺少名词性从句,则主句不完整.
再如：I'll give it to whoever needs it.
句中whoever needs it充当主句中介词to的宾语,不能缺少.
whoever引导名词性从句时,有两大特点：
1.whoever中含有的who在其引导的从句中也必须充当成分,一般是句子主语.
如例句中的whoever在从句中就充当主语,即needs it的主语.
2.whoever既在名词性从句中充当成分,且其引导的从句并不指代一件事情,而是指代“...的人”.
3.whoever此时可以换写成anybody who,将名词性从句转换成定语从句,这样更容易理解.
如：I’ll give it to (whoever needs it).
= I'll give it to (anybody who) needs it.
= I'll give it to anybody (who needs it).
讲解三：
1.no matter who只引导让步状语从句,no matter +what\who等等那些也是这样用.
No matter who comes here,tell him never to touch the switch.
（No matter who 可改为whoever）
不管谁到这里来,告诉他不要碰这开关.
No matter who comes here,tell him never to touch the switch.
（No matter who 可改为whoever）
不管谁到这里来,告诉他不要碰这开关.
2.whoever可引导让步状语从句,（此时可换成No matter who.）也可引导名词性从句如主语从句、宾语从句（不能换成No matter who）
There are great opportunities for whoever takes the crown.宾从（不能用No matter who）
不管谁摘得桂冠,都将有巨大的机遇.
Whoever you are,you have a right to learn.状从（可用No matter who）
不论你是何许人,都有学习的权利.
Whoever has interest in it can apply for membership.主从（不能用No matter who）
无论谁对它感兴趣都可以申请成为成员.
But whoever did it,Mr Putin has been vilified in the West's media.状从（可用No matter who ）
不管是谁做的,普京先生已经受到了西方媒体的诽谤.
一句话记忆：whoever一定可以代替No matter who ,但No matter who 不一定能代替whoever（只在作状语时可以）
。