only引导的倒装句:
一、only修饰的副词、介词短语、状语从句放在句首时要用倒装。
例句：
1.Only then did Alice realize her mistakes.
2.Only in this way can you finish the task in time.
3.Only when the war was over was Einstein able to get happily back to work.
二、not only引导的倒装句:是含有否定意义的副词放在句首时要用倒装。例句 ：
Not only was anything taken away from Einstein, but also his German citizenship.He became a man without country.
