only位于句首时要用部分倒装。其结构为only+副词/介词短语/状语从句位于句首时，句子（主句）要用部分倒装，即把be动词/助动词/情态动词放在主语前。
only倒装例句1.Only then will I have a chance to achieve my dream.
2.Only in this way，can you learn English well.
3.Only three people were hurt in the car accident.
4.Only after being asked three times did he come to the meeting.
5.Only then did I realize the importance of English.
6.Only by practising every day can you learn English well.
7.Only in this way can you solve the problem.
8.Only then did I realize my mistake.
9.Only then did he realize that he was wrong.
10.Only in this way are you able to do it well.
