The boy was very nervous when he was doing his university exam
The nervous system allows us to interact with our environment.
He hinted that he was nervous by scratching his nose.
We all get nervous in a probation moment.
Because he made her nervous, she tentatively accepted his offer of dinner.
I get very nervous when I am on stage performingYou are making me nervous.
It can be. It depends how it is used in the sentence.
Sentence: Neurologists treat people with disorders in the nervous system.
She was nervous knowing she had to rappel down the mountain, but she was confident in her training. The word rappel can be used as a noun or a verb.
I could tell that you were nervous by the perspiration on your brow.
He suffers from claustrophobia and is very nervous in elevators. The cramped quarters of a Soviet spacecraft was no place for someone with claustrophobia.
She had a tendency to bite her nails when she was nervous.
The bolded word "whenever" in the sentence is a subordinating conjunction. It introduces a dependent clause ("he was nervous") that cannot stand alone as a complete sentence.