also用于系动词be,情态动词,助动词之后,行为动词前,用于肯定句 too,as well用于肯定句句末 either用于否定句句末 My sister can speak English and French well, and she can also speak a little German. My father is good at swimming. And my mother does well in swimming , too. Tony likes Western music. And he likes Chinese traditional music as well. I can't sing . And My best friend can't sing, either.