“Also、as well” 和 “too” 都可以用来补充、添加句子的信息，表示 “也，还”。它们意思相近，但用法却稍有不同。通常情况下，“too” 和 “as well” 只能用在句尾；“also” 既能用在句首，也能用在句中。

用法总结

1 我们可以用 “also” 修饰动词，放在句子中间使用，表示 “也，还……”。

He's really good at tennis, but he also plays football really well.

Wei loves outdoor activities, but she also enjoys being at home.

2 “Also” 也可以用在句首，表示 “而且，此外……”，起到强调的作用。

He's really good at tennis. Also, he plays football really well.

Wei loves watching films. Also, she knows a lot about them.

3 “As well（也，此外）” 和 “too（也，还）” 用在句末。

He's really good at tennis, and he plays football really well as well.

He's really good at tennis, and he plays football really well too.

Wei loves watching films, and she knows a lot about them as well.

Wei loves watching films, and she knows a lot about them too.

两者之间的区别是，美式英语中 “as well” 没有 “too” 常用；而在英式英语中，“as well” 的使用频率高于 “too”。