Tom is an excellent skier, isn't he?

That which exercises reason is more excellent than that which does not exercise reason; there is nothing more excellent than the universe, therefore the universe exercises reason.

Australians excel at sports and entertainment.

With the exception of virtue, nothing is more excellent than friendship.

Tom's performance was excellent.

Tom is an excellent ambassador.

Tom certainly did an excellent job.

This is an excellent picture.

Tom would make an excellent spy.

The customer service is excellent.