Related:

• Rules for Good Grammar #4. 1: Don't use no double negatives.
  2: Make each pronoun agree with their antecedents....
• Watch out for irregular verbs which has cropped into our language. -- Writing Rule 04
• William Safire's Rules for Writers: Remember to never split an infinitive.
  The passive voice should never be used. Do not put statements in the negative form....
• Subject and verb always has to agree. -- Writing Rule 20
• Irregular verbs are on sale in the bargain basement.
• When music fails to agree to the ear, to soothe the ear and the heart and the senses, then it has missed its point.
  Maria Calla...
• The smothering of verbs is a cause of the weakening of the sentence impact.