1. too, also, as well三者用于肯定句，either用于否定句。

2. too, as well一般放在句尾，too前可用逗号与句子其他成分隔开，as well一般不可以。

例如：If you would go, I will go, too.

She can dance and she can sing as well.

3. also一般放在句中，位于be动词，助动词，情态动词之后，实意动词之前。

例如：She can dance and she can also sing.

Amy also takes part in a ceremony.

4. either用于否定句，通常位于句末。

例如：She can't speak Chinese and her husband can't either.

总结一句话：too, as well用于肯定句句末，too用逗号隔开，as well不用。also位于肯定句句中，either位于否定句末。

5.习题巩固

1) Making soup is not easy, and being a good chef is not easy,___.

2) He gave me advice and money___.

3) He will go to town tomorrow, I shall ___go.

4) I can't play the piano. He can't,___.

5) My father likes reading, and I do,___.

答案：1.either 2. as well 3. also 4. either 5. too