◇ Advanced Passive Voice
進階被動語態
被動式「be 動詞 + 過去分詞」的公式，可以與助動詞或其他時態結合，其變化需要注意。以句子為例， That space has been reserved for art to again help the kitchen blend into its environment. 其被動語態原本是 that space is reserved，但為了配合現在完成式，以表達過去持續至今的概念，所以 be 動詞被改為 have been，又因主詞是第三人稱單數，因此寫成 has been。
Example：
1. Documents must be submitted in paper format.
文件必須以紙本形式繳交。
2. Your request is being processed.
你的要求正在被處裡。
3. I noticed that a window had been left open.
我注意到有扇窗戶已經被打開了。