Related:

• 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....
• I is the first letter of the alphabet, the first word of the language, the first thought of the mind, the first object of affection.
  In grammar it is a pronoun of the first person and singular number....
• Why is brassiere singular and panties plural?
• Rules for Good Grammar #4. 1: Don't use no double negatives.
  2: Make each pronoun agree with their antecedents....
• Remember the good old days, when CPU was singular?
• Each pronoun agrees with their antecedent. -- Writing Rule 01