发布时间：2017-04-25 来源：新东方在线 发布人：继续
The sports meeting is being held in our school.
Another bridge is being built over the Changjiang River.
构成：be being 过去分词
A number of Dongfeng trucks are being shipped abroad.
1)“be being done” 中的动词be应随主语(sing./ pl.)作相应的变化.
2)将现在进行时的主动语态变为现在进行时的被动语态的关键是：把be doing变为be being done.
例1.The students are cleaning the classroom now.
→The classroom is being cleaned now.
现在学生们正在打扫教室.(are cleaning变为is being cleaned)
例2.The boy is counting some eggs.
→Some eggs are being counted.
那男孩正在数蛋.(is counting 变为 are being counted)