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Masafumi Fujino Posted 13 years ago
Grammar

Is an object needed?

Do you say "How did you know?" or "How did you know that?" I think the word "know" needs an object, but I've found the former sentence. Thanks always:)
  

Top answer

Both are possible. 'Know' does not have to have an object: A: I had my car stolen yesterday. B: I know.

— Fivejedjon

  • Both are possible.
  • 'Know' does not have to have an object: A: I had my car stolen yesterday.
  • B: I know.
  • Fred told me.
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2 Answers
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Both are possible. 'Know' does not have to have an object:

A: I had my car stolen yesterday.
B: I know. Fred told me.
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Masafumi Fujino Do you say "How did you know?" or "How did you know that?" I think the word "know" needs an object, but I've found the former sentence. Thanks always:)
A: That politician is lying to us!
B: How do you know?
A: His lips are moving.
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