too与as well 区别

问题描述:

too与as well 区别
Americans drink lots of coffee,they drink tea,_____.(句子大概是这样的,刚考的,有点忘了)
这里是填too 还是as well
还要too 与as well 的区别
课本里有一句话,
She bought a pair of cotton pants for Kangkang,as well.
课本应该是不会错的,那到底是填too还是as well?
as well 前到底加不加逗号?

填too
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