Wrong. He ordered bread and butter, ham and eggs, cucumbers and milk.
Right. He ordered bread and butter, ham and eggs, cucumbers, and milk.
815. Use a comma to separate elements which might otherwise become confused.
Wrong. Not long before he had bought the horse.
Right. Not long before, he had bought the horse.
Wrong. We drove up to the house, and the motor stopped allowing us to complete the trip without disaster along the road.
Right. We drove up to the house, and the motor stopped, allowing us to complete the trip without disaster along the road.
Confusing. Which of the men to choose from among all those who applied would be a difficult matter to decide.
Better. Which of the men to choose from among all those who applied, would be a difficult matter to decide.
816. Use commas to set off names in direct address.