if it were not for the fact that he is ill ,he would attend your party.

题目

if it were not for the fact that he is ill ,he would attend your party.
这里的the fact that he is ill,that从句是同位语,可是为什么用一般现在时态呢?

答案

这是虚拟语气,与一般现在时相反,if从句用过去式,主句用would/could等加动词原形.
上面句子中,that he is ill,是说他现在的实际情况,而对这个实际情况的假设在前面were中体现出来.