我很高兴听到他要来。为什么你大学毕业而不懂英语，用英语怎么说？

I am very happy of his coming. Why is it that you are university graduate but don't know English?

I'm very glad to hear that he is coming.
Why you graduated from the university but don't understand English?

I am very happy to hear that he is coming. But why, even after graduating from university, do you not understand english?

I am very happy to hear that he is coming. why don't you understand English even after graduating from university?