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What’s the grammatical error in had know?
Reviewed and edited by 
Anwar Kareem 28/09/2024, 20:40
Anwar Kareem 28/09/2024, 20:40English.me team member
What kind of error is it?
This is a grammatical error involving the use of incorrect verb tense. Specifically, it is an error in forming the past perfect tense.
Why do people make this mistake?
People often make this error due to confusion between "know" as a present or past simple form and "known" as the past participle. The structure of past perfect tense requires the past participle form, not the bare infinitive or present form of the verb.
What is correct?
The correct form is "had known," where "had" is the auxiliary verb and "known" is the past participle.
Examples of correct usage
- I wish I had known about the meeting earlier.
- If she had known the truth, she would have acted differently.
- They realized they had known each other for years.
Grammar
