though引导的从句叫什么从句?时态还需要一致吗?

让步状语从句:\x0d1):even if,though,even though,while(尽管) no matter what/how/which,however,whatever,whichever,however etc.\x0dHe will not give up smoking even though the doctor advises him to.\x0dWhatever the consequence may be,I will be on your side.\x0dHowever hard she tried to explain,nobody trusted her.\x0dIt has been the same result,whichever way you do it.\x0d2) 由as 引起的让步从句,语气较强烈,被强调的词须放在句首.\x0dSimple as the question may seem,it is not at all common in nature.\x0dCold as it is,the children play outdoors.\x0dMuch as I respect him,I can’t agree with him.\x0dObject as you may,I will go on with my plan.3) whether…or,不管…或…