The tent, chairs and tailgate food are packed in the car.
What is: Missing comma after chairs (Oxford comma)
The brother and sister are friends, they like to play outside together.
What is: A run-on. Needs a period after friends OR a comma FANBOY to combine OR semicolon to combine
Ms. Charles hat is not ready for pick-up.
What is: Ms. Charles's hat is not ready for pick up.
The book was hard to read its diction was strange.
What is: needs a semicolon after "read"
The branches leaves fell early in October.
What is: The branches' leaves fell early in October.
Most of the girls displays were organized, but Tess display was a mess.
What is: Most of the girls' displays were organized, but Tess's display was a mess. Or Most of the girls' displays were organized, but Tess's was a mess.
When Suzanne my forgetful sister went to the airport she realized that she forgot her I.D.
What is: When Suzanne, my forgetful sister, went to the airport, she realized that she forgot her I.D.
Buried under the ground.
What is: A fragment. Not a complete sentence at all.
Shes her own worst enemy, and Agnes problems dont help her case.
What is: She's her own worst enemy, and Agnes's problems don't help her case.
The mother searched high and low, and looked hard for the toys.
What is: The mother searched high and low and looked hard for the toys. OR The mother searched high and low; she looked hard for the toys. OR The mother searched high and low, and she looked hard for the toys. OR The mother searched high and low. She looked hard for the toys.
When the boys left home. She snuck into their room grabbed a blanket doused it in lighter fluid and then burned it in the backyard.
What is: When the boys left home, she snuck into their room, grabbed a blanket, doused it in lighter fluid, and then burned it in the backyard.
"The boy left the house," Thomas pleaded, "He is not here at all, so you can now leave!"
What is: The comma after pleaded should be a period.
That is my sisters favorite song, and they listen to it non-stop on Dads stereo.
What is: That is my sisters' favorite song, and they listen to it non-stop on Dad's stereo.