Before vs Previously

When to use each in English, with meaning, register, and examples.

Before

Top 1,000 (very common)A1preposition

Previously

Top 2,000 (common)B1adverb
Most common: Before
 BeforePreviously
Pronunciation🇬🇧 /["/bɪˈfɔː(r)/"]/🇺🇸 /["/bɪˈfɔːr/"]/🇬🇧 /["/ˈpriːviəsli/"]/🇺🇸 /["/ˈpriːviəsli/"]/
MeaningAt an earlier time than something else.Before now; earlier.
ExampleI always wash my hands before dinner.The building had previously been used as a hotel.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelA1B1
Part of speechprepositionadverb
Collocationsbefore dinner, before school, before sunrisepreviously mentioned, previously discussed, previously stated, previously introduced, previously reported
Antonymsafter, followingsubsequently, afterwards
Common mistakesConfusing 'before' with 'after'., Using 'before' to refer to an event that can only happen afterwards., Omitting the necessary clause or event after 'before'.Using 'previous' instead of 'previously' in a sentence., Confusing 'previously' with 'currently' which means now., Misplacing 'previously' in a sentence and changing the meaning.
Usage notesUsed to indicate a time prior to an event or action. Common in both spoken and written language. Avoid using it in extremely formal writing; in that context, consider 'prior to'.Use 'previously' to connect past events with the present. It's suitable for both spoken and written contexts but may sound too formal in casual conversations.

Frequently asked questions: Before vs Previously

What's the difference between Before and Previously?

Before: At an earlier time than something else. Previously: Before now; earlier.

Which is more common: Before and Previously?

Before is the most common in everyday English.

Which is more advanced: Before and Previously?

Previously is the highest level, at B1, on the CEFR scale.

Are Before and Previously the same CEFR level?

Before: A1, Previously: B1 on the CEFR scale.

What part of speech are Before and Previously?

Before: preposition, Previously: adverb.

Can you show an example of each?

Before: I always wash my hands before dinner. Previously: The building had previously been used as a hotel.

Can I use Before and Previously interchangeably?

Not always. Before and Previously are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.