Cool MateInform vs Let you know
When to use each in English, with meaning, register, and examples.
Inform
Top 2,000 (common)B2verb
Let you know
Top 1,000 (very common)
Most common: Let you know
| Inform | Let you know | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ɪnˈfɔːm/","/ɪnˈfɔːmz/","/ɪnˈfɔːmd/","/ɪnˈfɔːmɪŋ/"]/🇺🇸 /["/ɪnˈfɔːrm/","/ɪnˈfɔːrmz/","/ɪnˈfɔːrmd/","/ɪnˈfɔːrmɪŋ/"]/ | 🇬🇧 //lɛt jʊ nəʊ//🇺🇸 //lɛt jə noʊ// |
| Meaning | To tell someone something important or give them information. | To tell someone information later. |
| Example | Please inform me of any updates regarding the project timeline. | I will let you know as soon as I have more information. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | B2 | - |
| Part of speech | verb | |
| Collocations | merely, simply, regularly, be pleased to, regret to, be required to, about, of | let you know later, let you know soon, let you know when, let you know tomorrow |
| Antonyms | conceal, withhold, hide | - |
| Common mistakes | 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. | Using 'let you know' instead of 'let me know' when speaking about oneself., Confusing 'let you know' with 'let you see' – they have different meanings., Forgetting to follow up on the promise to inform someone. |
| Usage notes | Use 'inform' in formal contexts, like writing or business. Avoid in casual conversations where 'tell' is more appropriate. | Commonly used in informal speech to indicate that you'll inform someone about something. Suitable in both personal and professional contexts. |
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Frequently asked questions: Inform vs Let you know
What's the difference between Inform and Let you know?
Inform: To tell someone something important or give them information. Let you know: To tell someone information later.
Which is more common: Inform and Let you know?
Let you know is the most common in everyday English.
Can you show an example of each?
Inform: Please inform me of any updates regarding the project timeline. Let you know: I will let you know as soon as I have more information.
Can I use Inform and Let you know interchangeably?
Not always. Inform and Let you know 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.