我想问 为什么一个句子可以改成两种被动句?例如 He showed me some pictures.要怎么改?改成两个被动句.

因为有些动词可以接双宾语（直接宾语+间接宾语）可以把任何一个宾语前置做主语,改为被动语态.He showed me some picturesI was shown some pictures.(原间接宾语做主语）Some pictures were shown to me(原直接宾语...那可以在后面加 by him吗？还有 my mother is going to cook me a delicious meal.he sends his good friends some postcards every year.怎么改呢？真的很谢谢你。被动句中， 动作的执行者不是强调点， 所以往往不要by him 一类的。即省略。怎么改成两种被动句？my mother is going to cook me a delicious meal.he sends his good friends some postcards every year.怎么改呢？我举了一个例子， 不是我不愿意， 我做的再多是我在做，代替不了你。你要自己去悟才是正道。谢谢。 不是 我想要你把答案告诉我 我是做出来了 可是不太确定。最后问你一句 My mother is going to cook me a delicious meal. 可不可以改成a delicious meal is being gone to cook me . 我总觉得有点不对劲。可是我按照老师告诉我的方法就是这样的。看看 只需告诉我是不是这样改的。a delicious meal is going to be cooked to me （by my mother) is going to 即将，是个固定说法， 不要改动