答案是:这是表示与现在相反的虚拟语气,主句用would + 动词原形,if +从句 (从句中的be动词用were,其他的动词用过去式) ,比如:if I were you ,I would wear a shirt and a tie to the party ~手工翻译,尊重劳动,欢迎提问,感谢采纳!~