not only…but also中，also可以省略，例如：
They have lost not only their jobs but their homes their self- respect anf even their reason for living.他们不仅失去了工作，还失去了家园，自尊心，甚至活下去的理由（摘自《柯林斯英汉双解大词典》）（本句中，but also中的also被省略了）
Not only…but also是英语中比较常见的一个关联词组，用于连接两个表示并列关系的成分，着重强调后者。它的意思是“不仅…而且．..”其中的also有时可以省略。
主要用法
1、连接主语：
Not only I but also Tom and Mary are fond of watching television.
不仅我，而且汤姆和玛丽都喜欢看电视。
Not only Jim but also his wife saw her.
不但吉姆而且他妻子也见到了她。
2、连接谓语动词
The Americans and the British not only speak the same language but also share a large number of social customs.
英国人和美国人不但语言相同，而且有很多相同的风俗习惯。
注意not only…but also连接的动词一般不重复，这与汉语不同。如汉语说“我不仅懂英语，而且懂俄语”，英语则说“I know not only English but also Russian”，而不说“I not only know English but also know Russian”。
再如：“气体不仅改变形状，而且改变体积”，英译为“A gas changes not only in shape but also in volume.”（注意介词常重复）
3、连接宾语：
The problem for the recipient was trying to guess not only who the sender was， but also what his secret feelings might be.
收信人不仅要尽力猜出是谁的，还要推测寄信人内心有什么想法。
4、连接宾语补足语：
Light and bright colors make people not only happier but more active.
浅色和鲜艳的颜色不但使人看了高兴，也会使人更加活泼。
5、连接表语：
Shakespeare was not only a writer but (also) an actor。
莎士比亚不仅是一位剧作家，而且是一位演员。
6、连接状语：
If your friend reminds you kindly of your faults， take what he says not merely pleasantly but thank fully.
如果低你的朋友善意地指明出你的缺点，你不但要欣然接受，而且要心怀感激之情
后面的部分：only 和but都可以省略，但只能省略其一，不能同时，否则会变成“”就是另一个意思了
即只能变成“not ......”或者“ also
