虚拟语气中所有的be动词都要用were.在非正式英国英语中,was、were均可,但were较常用,而且更正式.在正式英国英语和美国英语的虚拟语气的从句中,动词'be'的过去时态一律用"were",不用was,即在从句中be用were代替.在“ If I were you"、"If I were in sb's position"、"If it were not for."中,were不可用was代替.
