Boy am I tired 是什么结构

Boy am I tired 是什么结构 i am tired .she tired I am tired of learning the piano.的句子结构 I am tired与I tired哪个对?在电影里看过几次I tired.I am tired那这句话是不是主系表结构 我太累了,i am too tired.为什么用am?tired是什么词性? I am a [ boy,girl]中文是什么 i am a boy 是什么语法? I am tired b()I am happy. I am tired ( ) happy today. Officially,I am so tired. I am really tired.(yesterday) So tired,am i escaping?