not only… but also是初中英语中的一个常见短语，当然也是考试的重点之一。今天我们就一起来浅析一下它的用法吧！
1. not only… but also应连接两个相对称的并列成分。例如：
Not only Mr Lin but also his son joined the Party two years ago.（连接两个主语）
I not only play tennis but also practise shooting.（连接两个谓语动词）
He plays not only the piano but also the violin.（连接两个宾语）
They speak English not only in class but also in the dormitory.（连接两个地点状语）
注 1： She not only sings well but also dances beautifully. = She doesn't only sing well but also dance beautifully.
注 2：句子“ He not only plays the piano but also the violin.”不是好的文体，因为 but also之后的成分与 not only之后的成分不对称。
2. not only… but also连接两个分句，并且 not only位于句首时，第一个分句中的主语和谓语要部分倒装。例如：
Not only does the sun give us light but also it gives us heat.
Not only did he speak English correctly, but also he speaks it fluently.
Not only is this young man clever but also he is hardworking.
3. not only… but also不能用在否定句中。例如：
误： They don't fear not only hardship but also death.
正： They fear neither hardship nor death.
正： They don't fear either hardship or death.
4. not only… but also连接两个主语时，谓语动词要和与其最近的主语保持人称和数的一致。例如：
Not only the students but also the teacher was against the plan. / Not only the teacher but also the students were against the plan.
5. not only… but also中的 not only不能分开使用，但 but also却可以分开使用。例如：
The area was not only hit by an unexpected heavy rain, but some bridges were also washed away.
6. not only… but also连接两个并列成分时，其中的 also有时可以省略。例如：
I not only heard it but (also) saw it.
7.也可用 but… too/ as well替代 not only… but also中的 but also。例如：
She not only sang well but danced gracefully too. = She not only sang well but danced gracefully as well.
8.也可用 furthermore， besides， moreover， in addition等替代 not only… but also中的 but also。例如：
Not only was there no food, but also/ furthermore/ besides/ moreover/ in addition there was no water.
9.也可用 merely， just， simply等替代 not only… but also中的 only。例如：
They not merely/ just/ simply broke into his office and stole his books, but also tore up his manuscripts.
10. not only A but also B= B as well as A，前者、后者的强调重点都在 B。（汉译时，要先译 as well as后面的词）例如：
The child is not only healthy but also lively. = The child is lively as well as healthy. 这孩子既健康又活泼。
It concerns not only me but also you. = It concerns you as well as me. 这件事不但与我有关，而且也与你有关。
