be.still another wrong idea about mixing foods is that prote
be. still another wrong idea about mixing foods is that proteins and carbohydrates should never be eaten at the same meal. be eaten 是被动用法,我对被动不太了解,有些时候只要用过去式就能表被动,为什么这里要加be? 还是那这个词来说,eat,
先看主动用法:should never eat proteins and carbohydrates 绝不能吃蛋白质与碳水化合物 再换成被动:proteins and carbohydrates should never be eaten蛋白质与碳水化合物绝不能被吃 吃:eat 被吃:be+eaten(eat的过去分词) 纠正一下:过去式和被动是两码事.过去式不能表被动