"English", as a noun, is not measurable by degrees. You could instead talk about an aspect of English that is measurable by degrees, for example accuracy, fluency, coherence etc.
"She speaks English with a high degree of accuracy".
October 14, 2018
Although they are both technically correct, nobody would say or write, "she speaks a high degree of english" in real life.
The 1st one is good.
October 13, 2018
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