if he were here ,that's very good 这句话是虚拟语气,可主句为什么不用would +动词

if he were here ,that's very good 这句话是虚拟语气,可主句为什么不用would +动词 If he ___ here ,that's very good .A.is B.was C.were .这句虚拟语气, 虚拟语气是If he were to leave today,he would get there by Friday. if用于虚拟语气,主句用would,could,sould,might+动词原形,这4个词可以互换吗? 这句话是虚拟语气吗Our teachers believe that if we did that,we would c if he ___ here,that's very good.A.is B.was.C.were D.has been If today was your last day 这句歌词,不是虚拟语气么...为什么不用were. If my father were here he would be very happy,----?为什么用would That would be very interesting 是虚拟语气吗 虚拟语气时态This child talks as if he were a man.这句话是对什么时态的虚拟啊?这里为 关于虚拟语气在虚拟语气的主句中,would/could/should/might这几个情态动词可以互换吗? He appeared as if he were sick.后面虚拟语气为什么用were而不是had been