Vow vs You can't promise somethin' like that

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

Vow

FormalTop 3,000 (common)C1verb

You can't promise somethin' like that

InformalTop 2,000 (common)
Most formal: VowMost common: You can't promise somethin' like that
 VowYou can't promise somethin' like that
Pronunciation🇬🇧 /["/vaʊ/","/vaʊz/","/vaʊd/","/ˈvaʊɪŋ/"]/🇺🇸 /["/vaʊ/","/vaʊz/","/vaʊd/","/ˈvaʊɪŋ/"]/🇬🇧 //juː kɑːnt ˈprɒmɪs ˈsʌmθɪŋ laɪk ðæt//🇺🇸 //ju kɑnt ˈprɑmɪs ˈsʌmθɪŋ laɪk ðæt//
MeaningA serious promise to do something.You cannot make a promise about something like that.
ExampleShe vowed never to speak to him again.You can't promise somethin' like that; it's just too risky.
RegisterFormalInformal
How commonTop 3,000 (common)Top 2,000 (common)
CEFR levelC1-
Part of speechverb
Collocationsquietly, silently, to, vow never to do something, vow revenge, vow revenge against somebodymake a promise, keep a promise, promise to help, promise someone, promise you won't
Antonymsbreak, violate-
Common mistakesConfused with 'cow' — they sound similar but have different meanings., Using in informal contexts — 'vow' is too strong for casual promises.'Promise' is often confused with 'guarantee', which have different meanings., Learners may forget to use 'that' after 'like' when trying to convey a specific example., 'Somethin'' is sometimes mistakenly written as 'something' in informal contexts.
Usage notesUse 'vow' when making a serious commitment, often in formal situations like weddings or ceremonies. Avoid in casual conversations.Used in casual conversation, often implies doubt or impossibility about the promise made.

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You can't promise somethin' like that

Frequently asked questions: Vow vs You can't promise somethin' like that

What's the difference between Vow and You can't promise somethin' like that?

Vow: A serious promise to do something. You can't promise somethin' like that: You cannot make a promise about something like that.

Which is more formal: Vow and You can't promise somethin' like that?

Vow is the most formal of these.

Which is more common: Vow and You can't promise somethin' like that?

You can't promise somethin' like that is the most common in everyday English.

Can you show an example of each?

Vow: She vowed never to speak to him again. You can't promise somethin' like that: You can't promise somethin' like that; it's just too risky.

Can I use Vow and You can't promise somethin' like that interchangeably?

Not always. Vow and You can't promise somethin' like that 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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