It seemed strange that the man who had developed...为什么要用虚拟语气

It seemed strange that the man who had developed...为什么要用虚拟语气 英语句子分析：It seemed strange that the man who had developed comm 71.It was strange that the man who had developed communism _ it is strange that为什么是虚拟语气?虚拟语气不是和事实相反吗? It seemed that the world was at an end .这句话是虚拟语气吗? 虚拟语气的问题it is strange that 关于虚拟语气:it is strange that .should +动词原形. it seemed ai if the world was at an end.虚拟语气为什么是was it seemed that the girl（）为什么要填had lost something important;而 It seemed as if后面不用虚拟语气用什么时态,注意是seemed .（虚拟语气）Was it strange that she _____ when she got that good it's high time that we did sth.这里为什么要用虚拟语气?