1. 构成
肯定式：am/ is / ar e + being done
否定式：am/ is/ are not + being done
疑问式：Am/ Is/ Are +主语+ being done?
2. 含义：表示“某人或某事正在被……”强调主语是动作的承受者，即主谓之间为被动关系。如：
We’ve not moved in our new house as it is being painted now.
3. 用法
1）表示说话时正在进行 的被动动作。
2）表示现阶段正在进行的被动动作，但动作不一定在此时此刻发 生。如：
A new railway station is being built.
3）表示一种习惯的被动行为，常带有赞赏、羡慕、讨厌等感情色彩，常与always, constantly 等次连用。如：
He is always being praised by the teacher.
4） 与某些情态动词连用，表示对正在发生的动作的推测。如：
He may be being beaten by his father at the very moment.
