4句话，英语被动时态全搞定
对话框回复“早安”和“晚安"，获取暖心音频问候
13.5 不同时态的被动语态（下）
过去进行时的被动语态
结构 “was/were+being+过去分词”
比如：
The case was being investigated then.
案件当时正在被调查。
现在完成时的被动语态形式
结构“have/has+been+过去分词”
比如：
An opinion is what someone believes is true but has not been proved.
看法是人们相信是真实的但未经证实的东西。
过去完成时的被动语态
结构 “had been+过去分词”
比如：
She said this old airport had never been used.
他说这座旧机场没有被使用过。
将来完成时的被动语态
结构“shall/will+have been+过去分词”
比如：
The design will have been done by the end of this week.
这个设计将在本周做完。
今日练习
They are living their parents for the moment because their own house______.
A.is being rebuilt
B.has been rebuilt
C.is rebuilt
D.has rebuilt
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