句子主语省略情况有很多种,你要说清楚你是什么句子才好给你解释可以你随便举一个例子，说明就行Be he rich or poor, I will love him.To be able to pass the final exam, the students prepare for it day and night.When asked about her age, she became a little unpleasant.我随便写的几个句子。有没有你想的类型嘛。。