also/as well/too/Either在用法有什么区别，使用规则分别是什么？-KET/PET英语词组辨析

Also, as well和too同为副词，且均有“此外、也”的意思，在使用时如何进行区分呢？

Also

Also一般用于写作，口语中较少使用。在写作中，Also所在的位置不同，代表的意思也不同。比如：当Also放在句首时，其作用是强调后面的内容，或增加新的观点。

The book is very interesting. Also, you can learn new knowledge from it.

当Also放在主语和谓语动词之间时，其作用是连接前后内容。

She works very hard but she also goes to the gym every week.

当Also放在句尾时，也是用来连接前后内容，不过这种情况我们更多使用too/ as well。

She contacted him in the office but he didn’t answer the phone. His mobile phone was silent also/too/as well.

与Also相反，As well 通常用在口语表达中，写作中较少使用。 As well通常用在句尾：

Hey, that's an idea! And we could get a band as well.

As well as与As well不同，As well as是介词词组，意为“除了”。

When they go to Austria, they like walking as well as skiing.

As well不能用在句首：

I just ignored it. I think everybody else did as well. Not: ~~As well I think everybody else did.~~

Too常常用于句尾，表示“也”，同时在句尾处也是一种固定表达，也用来表示祝愿。

-She looks really tired and she must be really hungry too. -Me too. -You look great! -You, too!

Too有时也会用在主语后，且需要用“，”分割，用来强调主语，这一用法不太常见。

We, too, have been very pleased to receive the prize on her behalf.

当进行否定表达时，我们使用Either进行连接，此时either也做副词使用。

It was a really nice hotel, and it wasn’t very expensive either. She doesn’t like eggs and she doesn’t like fish either.