After reading this: in/on the bed, I wonder whether "I'm on bed" is ungrammatical or not. The answerer of the question said

"On" never appears alone with "bed."

If we can say "I'm in bed", why can't we say "I'm on bed"? (Or can we?) I'm not sure, because I'm also familiar with on+noun. For example "on Y*uTube".

  • 2
    What is unclear about that article? As it says, "in bed" is fine but with "on" you must use "on the bed", "on my bed" etc. Commented Sep 1, 2021 at 14:07
  • 1
    Because bed and bed are essentially two different words. "in bed" refers to bed as a concept - occasionally it may mean a figurative bed rather than a physical one. "on the bed" strictly refers to an actual physical bed.
    – MikeB
    Commented Sep 1, 2021 at 14:18
  • "YouTube" is the name of a website. There's no "the"
    – gotube
    Commented Sep 2, 2021 at 3:42

1 Answer 1


“In bed” is an idiom that refers to a person who is resting or sleeping in a bed. It frequently implies being under bed clothes. Like other idioms, it can be odd.

“On the bed” is not an idiom and so follows the normal rules of English with respect to articles.

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