too, either
这两个副词都表示“也”,但too用于肯定句,either用于否定句。例如:
She can dance, and I can dance, too.
I haven’t read the book and my brother hasn’t either.
so, neither
so和neither都可用于倒装句, 但so表示肯定,neither表示否定。
例如:
My brother likes football and so do I.
My brother doesn’t like dancing and neither do I.
参考资料:http://www.fjzzjy.gov.cn/images/uploadfiles/20080229051300.doc