(1) 被动语态的用途
[观察1]
The plan was successfully carried out.
这个计划成功地实施了。
Many houses were destroyed in the hurricane.
很多房子在飓风中被毁。
[发现1] 当强调动作的承受者，将承受者作为谈话的中心时用被动语态。
[观察2]
All the work has been finished by now.
到现在为止，所有的工作都做完了。
The old stone bridge was built in the 1870s.
这座古老的石桥建于19世纪70年代。
