also用作副词，表示也、而且、同样地；表示两件事的性质相近或两件事情发生的时间相同，也可表示刚说过的话也适用于另一个人或物。
1.also是较正式的用词，多用于书面语，基本意思是“也”“还”,表示两件事的性质相近或两件事情发生的时间相同，也可表示刚说过的话也适用于另一个人或物。在句中起补充追加的作用。
2.also主要用于肯定句和疑问句。在书面语中,also偶可用在no,nothing或其他带有否定意义的词之前，而在否定词之后则不能用also,而要用either(但not also可用于反诘疑问句或修辞疑问句，偶尔也用于陈述句)。
3.also多位于实义动词之前，非实义动词或第一个非实义动词之后,有时可放在整个谓语动词之前,间或用于句末。偶尔为了加强语气, also还可放在句首。also在句中位置不同常会影响句子的意思。
4.not only ... but also 不但 ... 而且...
（1） not only … but also 应连接两个相对称的并列成分。
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）
（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 is this young man clever but also he is hardworking.
这个年轻人不仅聪明，而且勤奋。
（3）not only … but also 不能用在否定句中。
（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：
（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 washedaway.
（6）not only … but also 连接两个并列成分时，可以省略 but 或 also ，也可以把 but also 都省略掉。例如：
I not only heard it but （also） saw it.
He was not only compelled to stay at home， （but） also forbidden to see his friend.
She not only finished the task ahead of time， （but also） she came to help us.
（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 （or as well）
（8）not only A but also B = B as well as A， 但前者的强调重点在 B ；后者的强调重点也在 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。
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