Stuttered

The newcomer stuttered when he was nervous.

You stuttered.

Tom stuttered as a child.

"I-it d-d-d-doesn't w-w-work now. No!", he stuttered, and then immediately said a certain "No".

Tom stuttered.

Ziri stuttered: "R... Rima?"

Felix stuttered out he was being followed.

Jonas asked Amelia what she was doing and she stuttered and said she couldn't sleep.

I stuttered.

He stuttered while trying to answer the question.