With his son _____,the old man felt unhappy.to disappoint B.to be disappointed C.disappointing D.being disappointed 为什么是c呢
问题描述：
With his son _____,the old man felt unhappy.
to disappoint B.to be disappointed C.disappointing D.being disappointed 为什么是c呢
答
我感觉就是D~
详解看上面的大长篇,这句结构是with+名词/代词+形容词
being disappointed是一个形容词结构,作为补足语,表示his son的状态~
意思是：看到儿子很失望,老人也不开心
这种跟独立主格有点相似的东西确实很难说清楚~