he showed his letters patent in the court martial as proof positive句子成份,词的作用
问题描述：
he showed his letters patent in the court martial as proof positive句子成份,词的作用
答
该句就是一个简单句
主语：He
谓语：showed
宾语：his letters patent
状语：in the court martial （地点状语）；as proof positive（方式状语）