按英语习惯，当never, hardly, seldom, little, few, not until, not, no, no sooner, by no means, under no circumstances等否定词置于句首时，其后要用部分倒装。如：
Never did I see him again.
Little did I dream that the girl was my niece.
Seldom does he go out for dinner.
Hardly does she have time to listen to music.
No sooner had we reached the airport than the plane took off.
Not until we lose our health do we realize its value.
No sooner had she agreed to marry him than she started to have terrible doubts.
Under no circumstances are children allowed in the bar.