这很难教吧?举几个例子好了
The chair is broken by me.(椅子被我弄坏了）
I broke the chair.(我把椅子弄坏了）
Is the chair broken by you?
Did you broke the Chair?
动词要用过去分词,参考过去分词列表,大部分都像过去式一样加-ed的.
名词 + be + 过去分词 + 名词（可加可不加）.