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"How came i dont know that" vs "How come i dont know that"

The correct phrase is "how come I don't know that?". The verb "come" is used in the present tense in this expression, not in the past tense as in "how came I don't know that". The phrase is commonly used in informal English to express surprise or confusion.

Last Updated: March 29, 2024

How came i dont know that

This phrase is incorrect. The verb "come" should be in the present tense, not the past tense.

How come i dont know that

This phrase is correct and commonly used in informal English.

This phrase is used to express surprise or confusion about not knowing something. It is an informal way of asking why someone is unaware of a particular fact or information.

Examples:

  • How come I don't know that? I thought I was up to date with everything.
  • How come I don't know that? Did you forget to tell me?
  • How come I don't know that? It's important information.
  • How come I don't know that? I must have missed the memo.
  • How come I don't know that? I feel left out.

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