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Anonymous Posted 13 years ago
Grammar

Should you say: DID you know that pumice is the only rock that floats on water? Or, DO you know that pumice...
  

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You can say either one.

  • You can say either one.
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2 Answers
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AnonymousDID you know that pumice is the only rock that floats on water? Or, DO you know that pumice...
In AmE, did would be more natural there.

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