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Rule "mismatched verbs and tag question operators"

This is one of many errors that LanguageTool can detect.

Description: mismatched verbs and tag question operators
By default, this rule is not active in LanguageTool
Message: In a tag question, the operator (verb) must match the verb ‘was’.
Category: Punctuation (ID: PUNCTUATION)
Incorrect sentences
that this rule can detect:
  • I was late, didn't I?
    Correction suggestion: wasn't I
Correct sentences
for comparison:
  • If he was to return at 7, why didn't he?
  • It sure took you a long time to figure out what the problem was, didn't it?
ID: TAG_QUESTIONS_2 [8]
Version: 6.7-SNAPSHOT (2025-07-02 22:33:10 +0200)