only引导的倒装句是部分倒装。

only修饰的副词、介词短语、状语从句放在句首时要用倒装结构。例句：

1. Only then did he realize his mistakes.只有到那时他才意识到他的错误。

2.Only in this waycan you learn Chinese well.只有用这种方法你才能学好中文。

3.Only when the war was over was Einstein able to get happily back to work.只有到战争结束后，爱因斯坦才能愉快地重新回到工作中去。