1、要深入了解“关系代词型连接词”和“连接副词”，首先需要知道什么是“代词”，什么“副词”。
代词是指代人或事物的词，属于名词性用作主语、宾语或表语；副词是起修饰动词或形容词作用的词，用作表示时间、地点、原因、方式、程度等状语。
2、引导名词性从句（宾语从句、主语从句、表语从句）的wh- 式连接词也是如此。如果在句中充当主语、宾语或表语，它就是代词性连接词，即连接代词；如果在从句中充当状语，它就是副词性连接词，即连接副词。如：
代词性连接词
Tell me what it is. 告诉我这是什么。（what 是从句的表语） She was free to go to where she liked. 你想去哪里就去哪里。（where在从句中作 liked 的宾语） I asked him since when he had been there. 我问他从何时起就在这个地方。（when 在从句中作介词since 的宾语）
副词性连接词
I don't know where Lulu once lived. 我只知道露露住在什么地方。（where 在从句中作地点状语）That is how we parted. 我们就是这样分手的。（how在从句中作方式状语）He asked what it matters. 这有什么关系? （matter 是不及物动词，what 在从句中作程度状语）、
3、关系代词型连接词是连接代词中的一种特殊连词，其意思相当于“先行词 + 关系代词”，也就是说 what/whatever = 表示事物的名词 + 关系代词（所…的事）、where/wherever = 表示处所的名词 + 关系代词（所…的地方）、when/whenever = 表示时间的名词 + 关系代词（所…的时间）。例如：
He will take (what) you offer him = He will take (anything that) youoffer him. She was free to go to (where) she liked = She was free to go to (anywhere that) she liked. I asked him since (when) he had been there = I asked him since (what time at which) he had been there. Do (whatever) you like = Do (anything that) you like. Sit (wherever) you like = Sit (anywhere that) you like. Come (whenever) you like = Come (anytime that) you like.