Robin Hood evaded the sheriff yet again.
The sheriff is here. He wants his wife's underwear back.
The sheriff is on his way, madam.
Our sheriff is right here.
It would be much cleaner as:"Can you have the sheriff serve the subpoena?"or - "Will the sheriff serve the subpoena?"
No, but they should be capitalised as Sheriff's Deputies.
You just said one
Your quarry dwelleth not here, Sheriff.
The participle phrase in the sentence is "riding a horse." It functions as an adjective to describe the sheriff and the action he is performing.
He was a notorious bank robber who alluded the sheriff for years.
It is capitalized at the beginning of the sentence or when it forms part of the proper noun or when it precedes a person's name, or when it is used as a direct address. Examples: Sheriff Smith Where's the evidence, Sheriff?
The proper noun is Sheriff Stone, the name (and title) of a specific person.
The present-participial phrase "riding a horse" is an adjective, modifying sheriff.
Robin hood ended Sheriff George's reign of Nottingham.
It is capitalized at the beginning of the sentence, when it forms part of the proper noun, when it precedes a person's name or when it is used as a direct address. Examples: Mary has a scheduled meeting with Sheriff Llantos today. Have you seen the evidences, Sheriff?