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"How do you know that?" vs "How did you know that?"

Both phrases are correct, but they are used in different contexts. 'How did you know that?' is used when referring to a past event or situation, while 'How do you know that?' is used when asking about a current or ongoing situation.

Last Updated: March 20, 2024

How do you know that?

This phrase is correct and commonly used when asking about a current or ongoing situation.

This phrase is used to ask someone about how they know something that is currently happening or known to them.

Examples:

  • How do you know that she is coming over?
  • How do you know that the meeting is at 3 p.m.?

Alternatives:

  • How do you find out about that?
  • How do you learn about that?

How did you know that?

This phrase is correct and commonly used when referring to a past event or situation.

This phrase is used to ask someone about how they came to know something that happened in the past.

Examples:

  • How did you know that she was going to be there?
  • How did you know that the store was closed yesterday?

Alternatives:

  • How did you find out about that?
  • How did you learn about that?

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