什么叫做让步状语从句

在句子中作让步壮语的从句叫做让步状语从句
让步状语从句一般用下列词或短语引导:
though,although,even though,even if,as,whether...or not...,
whether or not, whatever,whichever,whoever,whomever,whosever,whenever,wherever,however,no matter who/what...