too和 as well的区别?

too,also,as well：都用于肯定句,表示前者怎样后者也怎样.
too：一般放在句尾,可用逗号和前面的句子隔开,也可不用；
also：其位置大多放在be动词、助动词、情态动词之后,实义动词之前；
as well：其位置一般放在句尾,三者可以作同义句转换.例如：
You need to go shopping and I need to go shopping,too.
=You need to go shopping and I also need to go shopping.
=You need to go shopping and I need to go shopping as well.

者都是也的意思
too只能用于句尾 例：I like singing,too.
as well也可用于句尾。例：I like singing as well.
有无逗号的区别

too：一般放在句尾，可用逗号和前面的句子隔开，也可不用；
as well：其位置一般放在句尾，三者可以作同义句转换。