Nobody has told me about it?

Nobody has told me about it? Your papa has told me about it.啥意思? Mother has [told] me about it.括号中为什么用told.请解析. He _ told me about it. yesterday nobody m---- anything about it to me. it upset him that nobody had told him about it为什么从句不用过去式 It was yesterday ( ) she told me about it. Nobody knew what had happened __they were told about it.A.wh i didn't know about it until he told me . I knew everying about it after my mother told me. Until he told me ,I knew _____ about it. I hardly knew anything about it _____you told me