用所给词的适当形式填空,When he knew the dog died,he left ___(happy)

问题描述:

用所给词的适当形式填空,When he knew the dog died,he left ___(happy)
希望能给出分析

请阅:
When he knew the dog died,he left 【unhappy】.
当他听闻狗狗的死讯,他闷闷不乐的离开了.
这里的【unhappy】是形容词作方式状语修饰前面的动词left