Formerly vs Now it used to be vs Previously

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

Formerly

FormalBeyond 10,000 (less common)B2adverb

Now it used to be

Top 2,000 (common)

Previously

Top 2,000 (common)B1adverb
Most formal: Formerly
 FormerlyNow it used to bePreviously
Pronunciation🇬🇧 /["/ˈfɔːməli/"]/🇺🇸 /["/ˈfɔːrmərli/"]/🇬🇧 //naʊ ɪt juːst tə biː//🇺🇸 //naʊ ɪt juːst tə bi//🇬🇧 /["/ˈpriːviəsli/"]/🇺🇸 /["/ˈpriːviəsli/"]/
Meaningin the past; before nowSomething that was true in the past but may not be now.Before now; earlier.
ExampleNamibia, formerly known as South West AfricaNow it used to be a lively market here.The building had previously been used as a hotel.
RegisterFormalNeutralNeutral
How commonBeyond 10,000 (less common)Top 2,000 (common)Top 2,000 (common)
CEFR levelB2-B1
Part of speechadverbadverb
Collocationsformerly a leader, formerly known, formerly usednow it used to be, used to be popular, used to be commonpreviously mentioned, previously discussed, previously stated, previously introduced, previously reported
Antonymscurrently, now-subsequently, afterwards
Common mistakesConfused with 'formally' — 'formerly' relates to the past, while 'formally' relates to official contexts., Omitting it when describing past roles or states, which can lead to ambiguity.Mixing up verb tenses; 'Now it use to be' is incorrect., Forgetting to include 'it' in the phrase., Confusing with 'now it is' which has a different meaning.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 notesUse 'formerly' to describe something that was true in the past but is no longer the case. It is more formal than saying 'used to'. Avoid in casual conversations.Often used to refer to changes over time, popular in conversational English. Avoid in formal writing.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.

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Formerly
Now it used to be

Frequently asked questions: Formerly vs Now it used to be vs Previously

What's the difference between Formerly, Now it used to be, and Previously?

Formerly: in the past; before now Now it used to be: Something that was true in the past but may not be now. Previously: Before now; earlier.

Which is more formal: Formerly, Now it used to be, and Previously?

Formerly is the most formal of these.

Which is more advanced: Formerly, Now it used to be, and Previously?

Formerly is the highest level, at B2, on the CEFR scale.

Can you show an example of each?

Formerly: Namibia, formerly known as South West Africa Now it used to be: Now it used to be a lively market here. Previously: The building had previously been used as a hotel.

Can I use Formerly, Now it used to be, and Previously interchangeably?

Not always. Formerly, Now it used to be, 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.

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