It is I who am to blame.为什么who 后面用am 不用 is?

It is I who am to blame.为什么who 后面用am 不用 is? it is not ----to blame for the problems.a.i who am b.me who i am who is It is I that who am unwilling to come . It is I who am wrong. It is I who am your leader this is who i am I rather than you who am to blame 的翻译 Who is to _____(blame)? It is I who want to see you.中为什么用I 不用me 请分析句子成分 It does not matter who it is I am talking to. 为什么用who is it 而不用who are you?