Must and Should

Must

Must verb - To be under necessity or obligation to.
Usage example: we must be quiet during the performance

Should is a synonym for must in auxiliary verb topic. In some cases you can use "Should" instead a verb "Must", when it comes to topics like ought to, demand. popular alternative

Should

Should verb - To be under necessity or obligation to.
Usage example: you should stop smoking

Must is a synonym for should in auxiliary verb topic. You can use "Must" instead a verb "Should", if it concerns topics such as demand, endure. popular alternative

Both words in one sentence

  • Non-Uniform Uniform Otherwise, ladies must wear stockings instead of socks.' These, I feel I should point out once again, are stockings, and the manual says nothing about what type of stockings one is allowed to wear.
  • There is something that The Protagonist must do, something that should not, must not, be ignored.
    Source: Plot Detour
  • Video Game / Orcs Must Die! Tropes relating to the first two games should go on this page, tropes particular to Unchained should go on that page.Tropes used in Orcs Must Die!
Cite this Source
Should and Must. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/must/should
Must & Should. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/must/should>.
Should or Must. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/must/should.
Google Ngram Viewer shows how "must" and "should" have occurred on timeline