I,who am your best friend,certainly will help you.这个句子的疑问

I,who am your best friend,certainly will help you.这个句子的疑问 I,who am your friend,will help you.这句话的语法问题 英语：I ,who am your good friend,will help you.这里为什么用who am 固定的 I,who _____ your best friend,will try my best to help you.A. I,who _______ your friend,will try my best to help you. I,who() your friend,will try to help you.空中用is还是am? I,who()your friend,will go all out to help you.括号内的谓语动词用am还是 l,who----your friend,will help you. I who () your best friend will do as far as I can to help yo 为什么I,who is your friend will help you.这里的的be动词用is I,who____ your friend,will try my best to help you with your I,___your good friend,will try my best to help you out.A.who