as well as是就远原则。
当as well as连接并列主语时（多数可理解为插入语，有无逗号均可），句中谓语动词的数应该和真正的主语，也就是as well as前面的主语，保持一致，即就远原则。例：
Halen, as well as his brothers, has gone abroad.
海伦和他的兄弟们都出国了。
Your wife as well as you is friendly to me.
你妻子和你对我都很友好
就远原则：”名词 + 介词/介词词组 + 名词 ”结构作主语时，谓语动词的单复数要与介词/介词短语前的名词（即离谓语动词比较远的那个主语）单复数保持一致。经常出现的此类介词/介词词组：but, except, besides, like, with, as well as, no less than, along with, in addition to, rather than, together with。
扩展资料：
as well as 的用法
As well as has a similar meaning to“not only”.（牛津用法词典）
1、在传统用法中，as well as并不等同于and。我们知道，在not only A but also B的结构中，语义上侧重B，而在A as well as B结构中，语义上侧重A，所以，一般翻译成“不仅B，而且A；既B，又/也A”。例：
In greenhouses,computers control the watering of the plants as well as the light and the temperature.在温室里，计算机既控制光照和温度，也控制作物的灌溉。
She is clever as well as beautiful.她不仅漂亮，而且聪明。（她既聪明又漂亮。）
2、在现代英语用法中，A as well as B可以用来表示A和B同等重要，即等同于and。例：
You helped him as well as me.你帮助了他和我。
She is clever as well as beautiful.她既聪明又漂亮。