Betty的英语比Susan好用英语怎么说

Betty's English is better than Susan's.

Betty has a better command over English than Susan.
这里光用English太抽象了，实际是说使用英语的能力或者是水平，所以用command比较贴切~

Betty's English is better than Susan's.
名词所有格既是形容词性物主代词也可以做名词性物主代词。

Betty's English is more useful than Susan's.

Betty's English is better that Susan's.

Betty's English is better than Susan's~~~~