It does have a few good feature,though.中为什么要用does,还有I like m

1、强调句句式,在谓语动词前加do或does,后接动词原形.
-------本句中,去掉does句意完整,说明 does起强调作用,加重语气,可以省略.
It has a few good feature
2、I like music that I can dance to.
-------that引导的是定语从句,修饰music.
复合句转为简单句------i like music.i can dance to music 这样句子结构便清晰明了.