They have also football as well as basketball .

他们不但有篮球,也有足球
as well as 常用来连接两个并列的成分,意思是“和,不仅……而且”.注意：as well as 强调的是前一项,后一项只是顺便提及.
http://www.mrshen.com/ArtRead.asp?articleid=64 如果有空可以看看as well as 的用法,希望对你的学习有所帮助