I have to tell vs Inform

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

I have to tell

Top 2,000 (common)

Inform

Top 2,000 (common)B2verb
 I have to tellInform
Pronunciation🇬🇧 //aɪ hæv tə tɛl//🇺🇸 //aɪ hæv tə tɛl//🇬🇧 /["/ɪnˈfɔːm/","/ɪnˈfɔːmz/","/ɪnˈfɔːmd/","/ɪnˈfɔːmɪŋ/"]/🇺🇸 /["/ɪnˈfɔːrm/","/ɪnˈfɔːrmz/","/ɪnˈfɔːrmd/","/ɪnˈfɔːrmɪŋ/"]/
MeaningI need to say somethingTo tell someone something important or give them information.
ExampleI have to tell you a secret about my birthday party.Please inform me of any updates regarding the project timeline.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR level-B2
Part of speechverb
Collocationstell a story, tell the truth, tell the difference, tell someone offmerely, simply, regularly, be pleased to, regret to, be required to, about, of
Antonyms-conceal, withhold, hide
Common mistakesUse 'speak' instead of 'tell' incorrectly., 'Tell to' is incorrect; use 'tell me' or 'tell him'.Confused with 'informant' — 'inform' is a verb, not a noun., Using 'inform' without an object — always say who you are informing., Misusing tenses — ensure correct form like 'informed' for the past.
Usage notesUse 'tell' when sharing information or a story. This phrase is common in both spoken and written English. Avoid in highly formal contexts.Use 'inform' in formal contexts, like writing or business. Avoid in casual conversations where 'tell' is more appropriate.

See it in real clips

I have to tell
Inform

Frequently asked questions: I have to tell vs Inform

What's the difference between I have to tell and Inform?

I have to tell: I need to say something Inform: To tell someone something important or give them information.

Can you show an example of each?

I have to tell: I have to tell you a secret about my birthday party. Inform: Please inform me of any updates regarding the project timeline.

Can I use I have to tell and Inform interchangeably?

Not always. I have to tell and Inform 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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