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I didn't mentioned this before vs I didn't mention this before

The correct phrase is 'I didn't mention this before.' The verb 'mention' should be in the base form, without 'ed', because 'didn't' already indicates the past tense.
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Explained by Jennifer
Editor at TextRanch

Last updated: July 12, 2024

I didn't mentioned this before

This phrase is incorrect. The verb 'mention' should be in the base form without 'ed' when used with 'didn't'.

The correct form is 'I didn't mention this before.' Use the base form of the verb 'mention' after 'didn't' to indicate the past tense.

Alternatives:

  • I didn't mention this before.
  • I haven't mentioned this before.
  • I hadn't mentioned this before.
  • I did not mention this before.

I didn't mention this before

This phrase is correct and commonly used in English.

This phrase is the correct form. Use 'mention' in the base form after 'didn't' to indicate the past tense.

Alternatives:

  • I didn't mention this before.
  • I haven't mentioned this before.
  • I hadn't mentioned this before.
  • I did not mention this before.

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