tell me it 和 tell me about it 有什么区别

英语中不能说tell me it
而只能说 tell it to me
但可说 tell me the stroy=tell the story to me
tell sb. sth意思：是告诉某人某事
tell sb. of/about sth. 意思是：讲述某事
I told him the news"我告诉他那条新闻"
I told him of the news."我跟他谈起过那条新闻"