also和too均是副詞，且都表示“也是”的意思，但在修辭意味和使用場(chǎng)合上有所不同。

它們的區(qū)別有以下幾點(diǎn)：

1. 一般說來，also用于比較正式(formal)的場(chǎng)合，語氣比too莊重；too是慣熟(familiar)的用語，使用范圍較廣。

2. also在句中的位置要緊靠動(dòng)詞；too在句中的位置比較靈活，有時(shí)插入句中，前后用逗號(hào)分開，有時(shí)放在句末。

3. too只能用在肯定句中，不可用于否定句內(nèi)。在否定句中，只能用either；also則可以用在否定句中。

下面我們來看一些例句：

The Hong Kong Chief Executive also leads the university as Chancellor．
香港行政長(zhǎng)官也以（大學(xué)）校監(jiān)身份領(lǐng)導(dǎo)大學(xué)。

Reading books is learning, but application is also learning and the more important form of learning．
讀書是學(xué)習(xí)，實(shí)踐也是學(xué)習(xí)，而且是更重要的學(xué)習(xí)。

We have not heard such a thing．Also, we have never seen such a scene．
我們沒有聽見過這種事情，我們也從來沒有見過這種場(chǎng)面。

請(qǐng)注意，一般說來，also在句中的位置應(yīng)緊靠動(dòng)詞，但有時(shí)為了強(qiáng)調(diào)其意，也可以將它放在句首或句末。

Here, too, the colon must be followed by a dash．
這里也一樣，應(yīng)當(dāng)在冒號(hào)之后加破折號(hào)。

Mary, too, can play the piano．
瑪麗也會(huì)彈鋼琴。

-Could you speak Japanese? -Yes, and Spanish too．
—您會(huì)說日語嗎？ —會(huì)的，還會(huì)說西班牙語哩。

also雖然和too同義，但前者大都用于書面語，后者大都用于口語。例：

The lady washed the children and also gave them dinner.（書面語）
The lady washed the children and gave them dinner too.（口語）

在口語中，too還可以用as well代替。

有時(shí)候，also在句中的位置不同，句子的涵義也會(huì)跟著變化。例：

John is also concerned in this matter.
涵義：John is concerned in this matter as well as that one.

John also is concerned in this matter.
涵義：John is concerned in this matter, just as somebody else is.

John is concerned in this matter also.
涵義：This matter is the last of many that have been mentioned.