# when vs when's

> English confusable word pair

## The two words

### when
*adverb · IPA /ˈwɛn/ · frequency rank #48*
At what time? At which time? Upon which occasion or circumstance? Used to introduce direct or indirect questions about time.

### when's
*contraction · IPA /wɛnz/ · frequency rank #22,550*
Contraction of when + is.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/when-vs-when-s