请教语法：被动语态跟过去分词做表语时怎么区别呢?

过去分词作表语与被动语态形式相同,但二者是有明显区别的.x0d1.被动语态强调动作,主语是动作承受者.过去分词作表语说明主语的状态或特征.如:x0d1)This novel was written in 1976.(被动,强调“写”的运用)x0d2)This novel is well written.系表,表示特征)x0d2.被动语态后常接by+执行者,表示某人做.而过去分词作表语后不接介词by,但可以接其它的介词,表示特征.x0d例如:1)The cup was broken by him.(被动)x0d2)The cup is broken.(系表)x0d3)I am interested in English.(系表)x0d3.被动语态可以有许多的时态变化,而系表结构没有进行时态.如: