1.even if (though)引导的让步状语从句,形式同if引导的虚拟条件句,译为“即使”.
He will come even if he is ill.即使他病了,他也会来的.
I won't give up even though we should fail ten times.即使失败十次,我也不会放弃.
2.由动词命令式构成的让步状语从句.
英语中没出现过动词命令式这个语法,这是西班牙语,法语等语言中的语法,在英语中应该类似于祈使句的用法.
3.以whatever,no matter,what (who,how),whether …or…引导的让步状语从句中,可用动词原形表示虚拟语气,主句用陈述语气.
however dull he may be,he is certainly a very sucessful top executive.
whether he be rich or poor,I'll marry him all the time.