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Rule "does ... 3rd person verb"

This is one of many errors that LanguageTool can detect.

Description: does ... 3rd person verb
Message: Did you mean <suggestion>\3</suggestion>? As 'do' is already inflected, the verb cannot also be inflected.
Category: Grammar (ID: GRAMMAR)
Link: https://languagetool.org/insights/post/grammar-forms-of-do/
Incorrect sentences
that this rule can detect:
  • He does not has expertise about that.
    Correction suggestion: have
  • Does anybody has an idea about that?
    Correction suggestion: have
Correct sentences
for comparison:
  • He does not have expertise about that.
  • Does anybody have an idea about that?
  • An algorithm that does so is usually considered invalid.
  • What it does: increases rate of gain and improves feed efficiency.
  • Does Lincoln Mills suggest that if Congress granted jurisdiction over interstate divorce cases, the federal courts would be authorized to fashion a national law for the dissolution of marriages?
  • Everyone also who does what is just (righteous) has been born of him.
  • It seems like as technologies emerge, I love to jump on the bandwagon around the end of the early adopters phase -- and then it either does or doesn't integrate well with my life.
  • The only reason Bobby does it is because he knows I would SMACK him if he didn't.
  • What he does here is not relevant.
  • He who fights may lose, but he who doesn't has already lost.
ID: DOES_X_HAS [1]
Version: 6.6-SNAPSHOT (2024-12-02 22:33:09 +0100)