一、概述
英语修辞的一个重要原则是尾重原则,即把句子最复杂的成分放在句尾以保持句子平衡。在语言使用中为了避免产生头重脚轻、结构不平衡的句子,我们常采用倒装语序。例如:
1. Not only did he refuse the gift,he also severely criticized the sender.
他没有收下礼物,还狠狠批评了送礼的人。
2. Hardly had she gone out when a student came to visit her.
她刚出门,就有个学生来访。
3. No sooner had she gone out than a student came to visit her.
她刚出门,就有个学生来访。

二、需要注意的是:
1. 如果置于句首的Not only… but also仅连接两个并列词语,不可用倒装结构,如:
Not only you but also I am fond of music
只有当Not only… but also连接两个分句时,才在第一个分句用倒装结构。例如:
1)Not only is he a teacher, but he is also a poet.
他不仅是一位教师,而且是一位诗人。
2)Not only did he speak more correctly, but he spoke more easily.
不仅他讲得更正确,也讲得更不费劲了。

2.如果修饰主语就不能倒装。
Only John was there-----因为only已经修饰主语了。
She met only John there------Only John did she meet there------only修饰John放在句首就要倒装.

3. “only+状语”位于句首时的倒装
当一个状语受副词only的修饰且置于句首时,其后用部分倒装语序:
Only then did he realize that he was wrong. 到那时他才意识到他错了。
Only in this way are you able to do it well. 你只有用这种方法才能把它做好。
Only when he returned home did he realize what had happened. 当他回到家里时,才知道出了什么事。

三、总结:
以上是关于only的英语倒装句,倒装是英语中一个重要的修辞手段。倒装句的使用丰富了我们的语言表达,了解并掌握倒装句各种句式的用法,不仅会提高我们对英语语言的欣赏能力,对英语表达能力的提高也将大有裨益。因此,写作中适当用一些倒装句式定会使文章表达更生动、有力。