英语 › 必修第二册 › 必二 U2 › 被动语态
主语是动作的承受者,且动作此刻正在进行时,用 am / is / are being done。
The bridge is being built now.(那座桥正在建造中。)
关键词:被动语态、passive voice、现在进行时的被动语态、being done、present continuous passive