为什么If only I were abird.中的were不用was

为什么If only I were abird.中的were不用was If only I were an Englishman是什么意思?为什么要用were? if only i were made of If only i were you!if only 这句中的Only又是什么意思呀? if only you were if only you were if only it were 为什么是if only I were you 而不是if only i was you If only i were as clever as you! if i were a 为什么if i were a boy?应该是 i was为什么是were if i were a boy 为什么‘I’后面跟‘were’? If only I ____ (be) ten years younger!我知道答案是 were 为什么? 请哪位高手给解释解释.were不是are 的过去试吗? If only it were that 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? If I were a boy中,为什么要用were? If only ,I If I were you