once before

USAGE SUMMARY

"once before" is correct and can be used in written English.
It is often used to refer to something that has happened or was done at least one time in the past. For example, "I had seen him once before, but I was not sure if he remembered me."

✓ Grammatically correct

News & Media

Science

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Once before!

The Guardian - Books

Hubris caused him difficulty once before.

The New York Times

"I was married once before," she said.

The New Yorker

Beatrice: Once before!

The Guardian - Books

We have been here once before, however.

The Guardian - Opinion

Tito: Once now or once before?

The Guardian - Books

That happened once before, too.

Forbes

It happened once before.

The New York Times - Sports

That happened once before.

The New York Times

We did that once before.

The New York Times - Magazine

"I've met him once before.

The New York Times

Expert writing Tips

Best practice

Use "once before" to clearly indicate a single prior occurrence of an event, action, or experience. It adds specificity compared to simply saying 'before'.

Common error

Avoid using "once before" when you need to emphasize multiple past occurrences. If something happened more than once, use phrases like "several times before" or "frequently in the past" instead.

Linguistic Context

The phrase "once before" functions as an adverbial phrase, modifying a verb or clause to indicate a past occurrence. Ludwig provides many examples showing how this phrase adds temporal context to actions or states.

Expression frequency: Very common

Frequent in

News & Media

55%

Science

25%

Formal & Business

10%

Less common in

Wiki

5%

Reference

3%

Encyclopedias

2%

Ludwig's WRAP-UP

In summary, the phrase "once before" is a grammatically sound and commonly used adverbial phrase. As Ludwig AI confirms, it's a correct and clear way to indicate that something has happened a single time in the past. Its neutral register makes it appropriate for diverse contexts, from news reporting to scientific writing. When using it, ensure you are indeed referring to a single prior occurrence, and explore alternatives like "previously" or "on a prior occasion" for stylistic variation. The abundance of examples and authoritative sources underlines the phrase's established place in the English language.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

one time previously

Alternative with similar meaning but altered structure. Adds 'one time' for emphasis.

previously

Single word alternative. Omits the 'once' and 'before', focusing on the action happening at an earlier time.

on a prior occasion

More formal alternative. Replaces "once" with "on a prior occasion", increasing the formality.

in the past

General alternative. Indicates that the event occurred at some unspecified time in the past.

at an earlier time

Similar to 'in the past' but slightly more specific. Emphasizes that the event occurred before the current moment.

formerly

Single word alternative focusing on a past state or condition.

prior to this

Focuses on the temporal sequence, highlighting that something happened before the present.

in the preceding instance

A more formal, almost legalistic way of saying something happened 'once before'.

a while back

Informal alternative. Indicates that the event happened some time ago.

in former times

A more archaic and literary alternative.

FAQs

How can I use "once before" in a sentence?

Use "once before" to indicate that something has happened a single time in the past. For example, "I had met him "once before", but I didn't remember his name."

What are some alternatives to the phrase "once before"?

Alternatives include "previously", "on a prior occasion", or "in the past". The best choice depends on the context and desired level of formality.

Is it correct to say "one time before" instead of "once before"?

While "one time before" is understandable, ""once before"" is more concise and grammatically standard. "One time previously" can be used for emphasis.

What's the difference between "once before" and "never before"?

"Once before" indicates a single prior occurrence, while "never before" indicates that something has not happened at all up to the present time.