27) too，also与either
1.too用于肯定句和疑问句，一般放在句尾，其前常加逗号。如：
We are in the same school, too. 我们也在相同的学校。
Do you play soccer every day, too?你也每天踢足球吗?
2.also用于肯定句和疑问句，一般位于实义动词前、be动词后。如：
Sandra is also a Korean student.Sandra 也是一个韩国学生。
3.either用于否定句，一般放在句末。如：
They don’t know the answer, either.她们也不知道答案。
4.as well as也有"也"的意思。如：
We have great mushroom pizza as well as soda.
He is a happy boy as well.