as well常用作状语,作“又；也”解，相当于too或also，常位于句末，无须用逗号与句子分开。as well在口语中也可用于句中，作“也好，也行”或“倒不如”解，用来缓和语气。as well as常用来连接两个并列的成分，作“也，还”解。它强调的是前一项，后一项只是顺便提及。所以连接并列主语时，谓语动词与前一项一致。

例句

I am going to London and my sister is going as well.

我要到伦敦去，我妹妹也要去。

I not only play the guitar,I sing as well.

我不但弹吉他，而且还演唱。

Your wife as well as you is friendly to me.

不仅你而且你的妻子也对我很友好。