如果你想表达教授的英语水平很高，你可以说：

The professor has excellent Engpsh skills.
The professor is fluent in Engpsh.
The professor speaks Engpsh very well.
The professor has a strong command of Engpsh.

如果你想表达教授的英语水平一般，你可以说：

The professor has good Engpsh skills.
The professor speaks Engpsh fairly well.
The professor is proficient in Engpsh.

如果你想表达教授的英语水平较差，你可以说：

The professor's Engpsh skills are not very strong.
The professor struggles with Engpsh.
The professor's Engpsh is not very fluent.

希望这些建议对你有帮助。