if i were a boy这首歌为什么谓语部分是were而不是单数形式?

if i were a boy为什么是were. “If I were a boy”的谓语为什么是“were”?“am”的过去时不是“was”吗? if i were a boy 为什么‘I’后面跟‘were’? If i were a boy 为什么用were啊 为什么 if i were a boy 中的were 不用was? 歌词“if i were a boy if i were a If I were a boy与If I am a boy.的的区别,为什么I 后面可以用were? 为什么是If I "were" a bird? if i were a boy 的中文翻译是神马 if i were a boy 这是何意? he treats me as if I were a stranger.为什么用were 而不是am If I were a boy翻译