Yes, “once” can be an adverb, but it can also function as a conjunction or noun, depending on the context.
Uses of “Once” as an Adverb:
- Indicating a Single Time or Occasion
- I have eaten at that restaurant once.
- She tried the dish once and loved it.
- Indicating a Past Time (Similar to “formerly”)
- He was once a chef at a famous restaurant.
- This place was once a bakery.
Other Uses of “Once”:
- As a Conjunction (Meaning “as soon as” or “when”)
- Call me once you arrive.
- Once the order is ready, I’ll pick it up.
- As a Noun (Referring to a single instance)
- You only get once to make a first impression.
Why “Once” Is an Adverb in Many Cases
- When it modifies a verb (e.g., “tried once”), it functions as an adverb.
- When it connects clauses (“Once you arrive…”), it acts as a conjunction.
- When it refers to a single event as a thing (“only once”), it is a noun.
Thus, “once” is often an adverb, but it can also be a conjunction or noun.
