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"Didn't know" vs "Did not know"

Both "did not know" and "didn't know" are correct, but "didn't know" is more commonly used in spoken and informal written English. Both phrases have the same meaning, but the contraction "didn't know" is more concise and natural in everyday conversation.

Last Updated: March 15, 2024

Didn't know

This phrase is the contraction of "did not know" and is more commonly used in spoken and informal written English.

This phrase is the contracted form of the negative past tense of the verb "know." It is more informal and commonly used in everyday conversation.

Alternatives:

  • wasn't aware
  • hadn't known
  • didn't realize

Did not know

This phrase is grammatically correct but less commonly used in everyday conversation.

This phrase is the full form of the negative past tense of the verb "know." It is more formal and less common in spoken English.

Alternatives:

  • was not aware
  • had no idea
  • was uninformed

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