he found the book on the desk 句子成分分析

he found the book on the desk 句子成分分析
he found the book on the desk
on the desk 是宾补,还是宾语的定语,还是地点状语啊?
the book is on the desk中的on the desk呢?
另：状语 定语 补语 插入语都修饰什么的?是主语?谓语还是.
第一句三个答案，这到底是神马啊？还是看理解，三个宾补定语状语都可以？