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Are they both correct? Is there a rule to clarify?

The phrase is 'it is a device you wear during sleep/during sleeping'

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  • 1
    Can you give me an example of a sentence you'd use it in? Commented Mar 14, 2016 at 21:15
  • 2
    I would use 'while sleeping', not 'during sleeping'. But an example to show context is needed to decide which or both.
    – user3169
    Commented Mar 14, 2016 at 21:46
  • I would say "while sleeping" but "during sleep" (probably the former more often, but it depends on the context).
    – J.R.
    Commented Mar 14, 2016 at 21:48
  • The phrase is 'it is a device you wear during sleep/during sleeping' Commented Mar 15, 2016 at 14:15

2 Answers 2

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The word 'during' is used before nouns (such as "sleep").

E.g. I like to eat during lunch.

The word 'while' should be used when referring to verbs (such as "sleeping") and often a subject is used in between them.

E.g. He was eating while I was sleeping.

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In my opinion ; ''During sleep ''is more natural. It has a good sound.

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  • Depends on context, as the other answer states, one would normally go with either during sleep or while sleeping
    – MikeB
    Commented May 26, 2020 at 11:15

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