I want to know if Mary needs any help.这里的want to know 是什么成分呢?

题目

I want to know if Mary needs any help.这里的want to know 是什么成分呢?
I want to know if Mary needs any help.
这里的want to know 是什么成分呢?

答案

want是谓语,to know是want的宾语
ps:
want 和 to know是分开的成分哦,不是连在一起看的