It's a pity that I can't further my research work because I have no chance请问that 引导的是个什么从句?

引导一个主语从句，代替的是形式主语it的内容。不能完成我的研究工作是个遗憾。

定语

定语从句

主语从句
解释：还原 that I can't further my research work is a pity 其中 that I can't further my research work 是一个由that引导的句子作主语，It一般我们把它叫做形式主语，而that引导的句子才是真正的主语。

英语中为了避免头重脚轻的句式，经常会用到 it is+名词或形容词 that..........的结构，你也可以理解为一个强调句
it is+强调部分+ that.........

主语从句
it 做形式主语
用it 作形式主语的结构
(1) It is +名词+that从句
It is a fact that … 事实是…
It is an honor that …非常荣幸
It is common knowledge that …是常识
(2) it is +形容词+that从句
It is natural that… 很自然…
It is strange that… 奇怪的是…
(3) it +不及物动词+that从句
It seems that… 似乎…
It happened that… 碰巧…
(4) it is+过去分词+that从句
It is reported that… 据报道…
It has been proved that… 已证实…