英语中的 inversion 倒装用法
部分倒装常用在否定副词开头：Never, Hardly, Scarcely, Rarely, Little。
Original: I had hardly sat down when the phone rang.
Inverted: Hardly had I sat down when the phone rang.
Inverted: Hardly had I sat down when the phone rang.
这种倒装在书面英语和正式演讲里使用频率很高，口语里反而少见。