因为不管主语是什么人称,动词一律用were。它只出现在单数第三人称主语后面
在if ,if only,as if ,as though, though引导条件状语和让步状语分句子 表非真实的条件和让步
在wish,would rather,suppose,imagine之后的that-从句表不可能发生的情况:i wish it were spring all years round .
上述were-型在第一,三人称单数主语之后被was所代替:if it was to rain,the game would be put off
在if i were you 分句中 和as it were =so to speak (宛如 好比)通常用were:he is my best friend,my second self ,as it were