Comma
Parallel Structure
Semicolons/Colons
Plural/Possessive
Subject-Verb Agreement
100
The recipe also calls for butter sugar and eggs.
The recipe also calls for butter, sugar, and eggs.
100
In the morning, the bird sang, the cat meowed, and the dog is barking.
the dog barked
100
The boys ran in the park Jim fell and broke his leg.
The boys ran in the park; Jim fell and broke his leg.
100
Both of my neighbors children are nice boys.
Both of my neighbors' children are nice boys.
100
The dog or the cats (is, are) outside.
are
200
Either blueberries grapes or plums stained the front of Rob’s new jacket.
Either blueberries, grapes, or plums stained the front of Rob’s new jacket.
200
Before the race began, all of the runners stretched, drank water, and are running in place.
ran in place.
200
After the game, we went out for ice cream the weather was warm enough for ice cream in February.
After the game, we went out for ice cream; the weather was warm enough for ice cream in February.
200
After Draco Malfoy learned about Rachel postcard collection, he brought back a set from New York City.
After Draco Malfoy learned about Rachel's postcard collection, he brought back a set from New York City.
200
Walt Whitman, along with other authors, (write, writes) many poems about America.
writes
300
Lord Voldemort buys his surfboards from the shop at 10 Kahakai Road Honolulu Hawaii 96820.
Lord Voldemort buys his surfboards from the shop at 10 Kahakai Road, Honolulu, Hawaii 96820.
300
During the movie, many people ate popcorn, looked at their phones, and are sleeping.
slept.
300
I had a cookie however Sally was hangry and needed to eat.
I had a cookie; however Sally was hangry and needed to eat.
300
Gilderoy Lockhart told the other's a funny story to pass the time.
Gilderoy Lockhart told the others a funny story to pass the time.
300
Either my shoes or your coat (is, are) always on the floor.
is
400
After the show everyone went out for dinner
After the show, everyone went out for dinner
400
When they arrived at the dinner, they ate Beth's lasagna, the salad that Joe made, and Sarah's pumpkin pie.
Joe's salad.
400
I wanted to demonstrate my understanding therefore, I studied for the test.
I wanted to demonstrate my understanding; therefore, I studied for the test.
400
Unless the magicians tiny rabbit can do a cartwheel, Severus Snape will be disappointed.
Unless the magician's tiny rabbit can do a cartwheel, Severus Snape will be disappointed.
400
All of the books, including the manga book, (is, are) in the library.
are
500
“After a brief pause” she said “the rain started again.”
“After a brief pause,” she said, “the rain started again.”
500
After no rabbit popped out of the hat, Lori decided she had neither the patience nor did she have the good humor to tolerate another of Darren's poorly performed magic tricks.
the good humor
500
This is what we know if you do what you love, you'll never work a day in your life.
This is what we know: if you do what you love, you'll never work a day in your life.
500
Nala shops at Justin's store to find the rarest baseball cards.
The sentence is correct!
500
Neither the pasta nor the vegetables (were, was) ready for the dinner on time.
were