帮我分析一下这个句子语法结构

这是典型的主谓宾结构
The main reason是主语
depends on是谓语
its own problems是宾语
mainly是状语

你想说的大概是：主要原因在于它自身的问题

但必须指出 该句是中式英语 建议改为

The main reason mainly lies in its own problems.

lies in 在于。。。比depend on 更准确

the main:定语
reason:主语
mainly:状语
depend on:谓语
its own:定语
problems:作介词on的宾语。

The main reason mainly depends on its own problems
The main reason是主语
depends on是谓语
its own problems是宾语
mainly是修饰谓语的状语

The main reason是主语
depends on是谓语
its own problems是宾语
mainly是修饰谓语的状语

the main reason 主语
depends on 谓语
its own proble 宾语