部分倒装的几种情况：句首为否定或半否定的词语，如no，not，never，seldom，little，hardly，at no time，in no way，not until；否定词开头作部分倒装等。
如no，not，never，seldom，little，hardly，at no time，in no way，not until等。
Never have I seen such a performance.
Not until the child fell asleep did the mother leave the room.
当Not until引出主从复合句，主句倒装，从句不倒装。注意：如否定词不在句首不倒装。比如：I have never seen such a performance.
The mother didn't leave the room until the child fell asleep.
如 Not only…but also, Hardly/Scarcely…when, No sooner… than等，要倒装。例如：
Not only did he refuse the gift, he also severely criticized the sender.
Hardly had she gone out when a student came to visit her.
No sooner had she gone out than a student came to visit her.
Tom can speak French. So can Jack.
If you won't go, neither will I.
Only in this way, can you learn English well.
Only after being asked three times did he come to the meeting.
Only when he is seriously ill does he ever stay in bed.
Try hard as he will, he never seems able to do the work satisfactorily.
So frightened was he that he did not dare to move an inch.
May you all be happy. 愿你们都快乐。
Were I you, I would try it again. 我是你的话，就再试一次。