only倒装句的三种情况是:only+副词位于句首、 only+介词短语位于句首、only+状语从句位于句首。only可作为副词，形容词，连词使用。
做副词翻译为:只只有仅仅在...情况下。作形容词翻译为:仅有的唯一的最好的。作介词翻译为:不过但是可是。
例句:
1、 Only by shouting was he able to make himself heard.
他只有叫喊才能让别人听到他。
2、Only by working hard can you succeed.
只有努力工作你才能成功。
3、 Only after she died was | able to appreciate her.只有到她死后我才认识到她的价值。
5、 Only after he had spoken out the word did he realize he had made a big mistake.
只有当他已经说出那个字后才 自己犯了个大错误。
