(One space is only one of the rules that has been changed since I learned them.)
- This is the first sentence. This is the second sentence. Only one space separates them.
- He can’t wait that long. You have to get here sooner.
- Jack and Jill went up the hill to fetch a pail of water. Jack fell down and broke his crown and Jill came tumbling after.
- Famous animals lived in Farmer Brown’s barnyard. The cow jumped over the moon. The three little pigs built different houses. The goose laid a golden egg every day.
Separate initials and end abbreviations
- George H. Hamilton
- Dr. Johnathon Carson
- John C. Doe
- Martin Hapsburg, Jr.
- i.e. (not capitalized)
- 7:00 a.m. or 7:00 A.M.
- or 7:00 am or 7:00 pm (periods not required)
- 715 B.C. or 715 BC
- 715 B.C.E. or 715 BCE
- 1492 A.D. or 1492 AD
- (Anno Domino)
- 1492 C.E. or 1492 CE
- (Common Era)
- St. Francis of Assisi
- Dec. 25
- 30 degrees F. (Fahrenheit
- 20 degrees C. (Celsius)
- Bozeman, MT 59714
- The train left at 7:00 P.M.
- The author died in 1825 A.D.
- They named him after his father, Thomas Paine, Sr.
- Who was born in 717 B.C.?
- What happens at 100 degrees C.?
- I can’t believe he left at 4:00 A.M.!
Acronyms (no periods)
- ABC = American Broadcasting Company
- NASA = National Aeronautics and Space Administration
- WYSIWYG = What You See Is What You Get
Periods end dialogue inside the closing quotation mark.
- “Hello,” she said. “I haven’t seen you in a long time.”
- She recited Carl Sandburg’s poem about fog: “The fog comes in on little cat feet. It sits looking over harbor and city on silent haunches and then moves on.”
- The man looked around before he replied, “I have no idea where I am.”
Indirect questions end with a period.
- They wondered where they were.
- Harriet asked if she could use the phone.
- I would like to ask if I can borrow your bicycle.
- Turn right at the corner.
- Hand in your paper before the end of class.
- Stop! Now! Don’t hit that tree!