您好，not only ... but also ... 在英语的连词中称为“Correlative Conjunction（关联连词）”，是6个关联连词中最常用的一个。掌握这个“关联连词”的关键在于理解它的结构和目的。
not only ... but also ...（不仅……而且……）用于介绍两个同样重要或重要的平行想法或元素。通过使用这个短语，作者可以强调这些想法之间的关系并突出它们的综合影响。这个结构为句子增加了一层强调和复杂性，使其成为有效沟通的宝贵工具。
正确的使用这个“关联连词”需要注意四点：
将 not only（不仅）放在要强调的第一个元素之前。
在 not only（不仅）后面加上辅助动词或助动词，与第一个元素的动词时态相匹配。
将 but also（但也）放在要强调的第二个元素之前。
在 but also（但也）后面加上与第二个元素的动词时态相匹配的辅助动词或助动词。
关联连词 not only ... but also ...（不仅……而且……）可以与各种词性一起使用，具体取决于上下文和要强调的特定元素。以下是一些示例：
名词：
She is not only a talented musician, but also a skilled painter, showcasing her diverse artistic abilities.
(她不仅是一位才华横溢的音乐家，也是一位技艺精湛的画家，展示了她多样化的艺术才能。)
第一元素：a talented musician
第二元素：a skilled painter
动词：
The new restaurant not only offers delicious food, but also provides a cozy and inviting atmosphere.
(新餐厅不仅提供美味的食物，还营造出舒适温馨的氛围。)
第一元素：offers delicious food
第二元素：provides a cozy and inviting atmosphere
形容词：
John's presentation was not only informative, but also captivating, leaving the audience in awe.
(约翰的演讲不仅内容丰富，而且令人叹为观止，让观众惊叹不已。)
第一元素：informative
第二元素：captivating
副词：
She not only ran swiftly, but also finished the race first.
(她不仅跑得很快，还率先完成了比赛。)
第一元素：ran swiftly
第二元素：finished the race first
not only ... but also ... 还可以通过“倒装结构”进一步升华其结构，比如上面的句子：
She not only ran swiftly, but also finished the race first.
= Not only did she run swiftly, but she also finished the race first.
使用倒装结构时，需要注意的是倒装仅发生在 not only 的部分而 but also 采用陈述句结构。
使用 not only ... but also ... 最常犯的错误就是缺乏“平行结构”，也就是 not only 和 but also 后接的词组必须是平行结构，在词性或是时态需要保持平行。比如：
错误的：I read not only the book, but also saw the movie.
正确的：I not only read the book, but also saw the movie.
解析：not only + 动词 / but also + 动词
错误的：We not only ate the biscuits, but also half the donuts.
正确的：We ate not only the biscuits, but also half the donus.
解析：动词 + not only + 名词 / but also + 名词
notonly的倒装用法如下：
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。
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：
4、Not only you but also I am fond of music.不但你发现了而且我也找到了音乐。
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：
5、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。
6、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。
“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：
7、Only then did he realize that he was wrong. 到那时他才意识到他错了。
8、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。