As an adjective:
* "The doctor gave a professional and reassuring explanation of the procedure." (Describing the doctor's behavior)
* "She presented her ideas in a professional and well-organized manner." (Describing a presentation)
* "The restaurant has a professional and elegant atmosphere." (Describing the restaurant's ambiance)
As a noun:
* "The event was attended by professionals from various industries." (Referring to people with specialized skills)
* "He's a professional athlete, dedicated to his craft." (Referring to someone who earns a living through their skills)
* "She hired a professional to clean her house." (Referring to someone paid to perform a service)
As an adverb:
* "He acted very professionally, even under pressure." (Describing how someone behaved)
* "The company handled the complaint professionally and efficiently." (Describing how a company handled a situation)
In a phrase:
* "It's important to maintain a professional appearance at work."
* "She's a true professional in her field."
* "He took a professional approach to problem-solving."
Remember to choose the correct form of "professional" based on the context and the meaning you want to convey.