i have something important to tell you此句中不定式to tell you作什么成分

i have something important to tell you此句中不定式to tell you作什么成分 I have something important to tell you. I have something important to tell you.to tell you.是什么成分? Do you have anything important to tell us?中动词不定式做什么成分? i have something important to tell you什么意思? i have something important to tell you为何+to I have something important to tell you.Please stop--- 改错：I have important something to tell you. i have something important to tell you的一般疑问句 （）,everyone!I have something important to tell you. I am sorry to have you kept you waiting.句中不定式作什么成分 I have something to tell you?It's important.改为同义句