英语重复的句子中“too”必须要加吗?

问题描述:

英语重复的句子中“too”必须要加吗?
在肯定句中.

只在肯定句中.肯定句用too或also
例句:Cici likes apples.I like apples,too.
Cici likes apples.I also like apples.
否定句用either
例句:Cici doesn't like apples.I don't like them,either.