三者都有”也“的意思，其中 also 和 too 可以以相同的方式使用。然而，我们把它们放在不同的地方，在肯定句中使用 also 和 too，而在否定句中则使用 either。

其中，also 放在 be 动词和在情态动词之后，实义动词之前，而 too 放在句尾，此时它的意思跟 also 一样，所以解答此类的题目，只需判断句型或位置就可以了。

一、用 also，too 或 either 完成下列句子

1、I don’t like cold climates. I don't think you like it _____.

2、My friends are going to college next year. I am _____ going to college next year.

3、My wife is a diligent engineer. I am a diligent engineer _____.

4、I love swimming. My son loves it _____.

5、Today the weather isn't so good. It wasn't really good yesterday _____.

6、I eat a lot more than an average person. My brother _____ eats a lot.

7、A bear can run very fast. A tiger runs very fast _____.

8、I am not from Italy. My friend isn't from Italy _____.

9、Paris is a big city. Madrid is _____ a big city.

10、French is a difficult language to learn. Latin is a difficult language to learn _____.

11、Henry is very athletic. He loves swimming, surfing, snowboarding and skiing. Jason _____ loves to swim and surf, but he hates all winter sports because he can't stand cold weather.

12、I am taking a great art history class at the junior college downtown. Sarah is in the class _____. We both love it.

13、I don't really like tomatoes. My brother doesn't like them _____.

14、I am really tired, and I don't feel like going out tonight _____. Let's just stay home tonight.

15、I don't really feel like going out tonight, and I am _____ really tired. Let's just stay home tonight.

二、答案及解析

1、either

解析：在否定句（don't）中用 either。

2、also

解析：在 be 动词（am）之后用 also。

3、too

解析：在肯定句尾用 too。

4、too

解析：在肯定句尾用 too。

5、either

解析：在否定句（wasn't）中用 either。

6、also

解析：在实义动词（eat）之前用 also。

7、too

解析：在肯定句尾用 too。

8、either

解析：在否定句（isn't）中用 either。

9、also

解析：在 be 动词（is）之后用 also。

10、too

解析：在肯定句尾用 too。

11、also

解析：在实义动词（love）之前用 also。

12、too

解析：在肯定句尾用 too。

13、either

解析：在否定句（doesn't）中用 either。

14、either

解析：在否定句（don't）中用 either。

15、also

解析：在 be 动词（am）之后用 also。