Semicolons
Colons
Commas
100

The last day of summer vacation arrived therefore, we prepared for the first day of the school year.

The last day of summer vacation arrived; therefore, we prepared for the first day of the school year.

100

They should leave at 1130.

They should leave at 11:30.

100

After the game Ben went to eat with his team. (1)

What is, After the game, Ben went to eat with his team.

200

She enjoys ice skating she learned how to roller-blade when she was a child.

She enjoys ice skating; she learned how to roller-blade when she was a child.

200

Please get the following bread, cheese, and milk.

Please get the following: bread, cheese, and milk.

200

She replied "This rock group The Beatles makes great music." (3)

She replied, "This rock group, The Beatles, makes great music."

300

On Thursday evening, Stuart decided to go camping on Friday morning, he packed his bags and left.

On Thursday evening, Stuart decided to go camping; on Friday morning, he packed his bags and left.

300

Note these tips for hammering in a nail hold the hammer at the end of the handle, position the nail carefully, and watch your thumb.

Note these tips for hammering in a nail: hold the hammer at the end of the handle, position the nail carefully, and watch your thumb.

300

Harvey the only Australian in the group was so much fun. (2)

Harvey, the only Australian in the group,was so much fun. 

400

The blood mobile will be at school on Wednesday, October 12 Friday, October 14 Friday, October 21.

The blood mobile will be at school on Wednesday, October 12; Friday, October 14; Friday, October 21.

400

The graduate was nervous about college leaving her friends, family, and life behind.

The graduate was nervous about college: leaving her friends, family, and life behind.

400

Mrs. Crane the best teacher in the world threw us a pizza party. (2)

Mrs. Crane, the best teacher in the world, threw us a pizza party.

500

Paula did well in two subjects therefore, she will have a high average.

Paula did well in two subjects; therefore, she will have a high average.

500

John wrote "We are writing to inform you that your application is in the mail."

John wrote: "We are writing to inform you that your application is in the mail."

500

After enduring the storm the Ross family collected their clothes loaded into the car and headed out of town. (2-3)

After enduring the storm, the Ross family collected their clothes, loaded into the car, and headed out of town.