What is the common noun for The conductor punched holes in tickets?

The common noun for "conductor" in the sentence "The conductor punched holes in tickets" is simply conductor.

Let's break it down:

* Conductor: This is the specific noun in the sentence, referring to a person who conducts something, in this case, a train or bus.

* Common Noun: A common noun is a general name for a person, place, or thing.

Since "conductor" is a general term for someone who conducts, it's already a common noun.