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?

I want to know if you ever loved me? I want to know if it ____(not rain) tomorrow i want to know if he ___(come) yesterday. I want to know if you can be with joy, i want to know if there is anything new还是i want to know if there is something new i want to know if there is anything new还是i want to know if there is something new 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? I want to know if you are late.Tell me if you are I want to know more! I want to know why I want to know ______ I want to know you. i dont want to know I want to know you I just want to know,If you too feel afraid,I can feel your heartbeats. I want to know if i have a guitar lesson tonighe? I really want to get what I want.I tried,don't know if there will be a resul i want to know if she___ (come)to the party tomorrow.