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 +动词原形呢

问题描述:

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 +动词原形呢

有时说话人会中途变换语气.如果条件从句中用了虚拟语气(假设语气),结果主句中可以用直陈语气(直述语气),你给出的句子属于这一类,又比如:
I am not bad looking if my skin weren't so sallow.
希望我能帮助你解疑释惑.