too,
as
well和
also用于肯定句和
疑问句，too和as
well多用于口语，一般放在句末，而also多用于书面语，一般放在句中与动词连用。either
用于否定句和否定的疑问句，往往放在句末。如：
He
went
there
too.
He
didn't
go
there
either.
I
like
you
as
well.
I
also
went
there.
also，too，as
well与either
的区别
also，as
well，too，用于肯定句，also常用于
be动词，情态动词，
助动词之后，行为动词之前；as
well，too用于句末；either用于否定句中，置于句末。
例如，
My
father
is
a
teacher.
My
mother
is
also
a
teacher.
=My
father
is
a
teacher.
My
mother
is
a
teacher
as
well.
=My
father
is
a
teacher.
My
mother
is
a
teacher，too.
我爸爸是一名老师，我妈妈也是。
I
can’t
speak
French..
Jenny
can’t
speak
French，either.
我不会说法语，詹妮也不会。