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在正式文体中，如果将never, seldom, rarely, little, hardly, scarcely, no sooner, no longer, nowhere 等含有否定意义的副词若位于句首，则其后的句子要用部分倒装。如：
■后来我再也没见到过他了。
I never saw him again.
→Never did I see him again.
■他很少出去吃饭。
He seldom goes out for dinner.
→Seldom does he go out for dinner.
■她几乎没时间听音乐。
She hardly has time to listen to music.
→Hardly does she have time to listen to music.
■他几乎没有认识到他面临的危险。
He little realized the danger he faced.
→Little did he realize the danger he faced.
对于not…until句型，当not until…位于句首时，其后的主句要用倒装语序。如：
■雨停了之后他才离开这房间。
He didn’t leave the room until the rain stopped.
→Not until the rain stopped did he leave the room.
某些起副词作用的介词短语，由于含有否定词，若位于句首，其后要用部分倒装。如：
On no accounts must this switch be touched. 这个开关是绝不能触摸的。
In [Under] no circumstances will I lend money to him.无论如何我也不会再借钱给他了。
