Comewhatmay,weshallalwaysstandtogether.这句话是让步状语从句吗?whatmay修饰的是come吗?
Shouldtheirschemehavesucceeded,thatwouldhaveledtoagreatretrogression.
这句话是虚拟条件句的省略句,主句用wouldhavedone.从句就应该是haddone.为什么这里是Shouldtheirschemehavesucceeded