Related:

• Verbs has to agree with their subjects.
• Irregular verbs are on sale in the bargain basement.
• Whenever one word or letter can change the entire meaning of a sentence, the probability of an error being made will be in direct proportion to the embarrassment it will cause.
  -- Bob Considine...
• You cannot strengthen the weak by weakening the strong. -- Abraham Lincol
• Forget this sentence!
• This sentence no verb.
• Rules for Good Grammar #4. 1: Don't use no double negatives.
  2: Make each pronoun agree with their antecedents....