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After finishing the test I checked my answers.
After finishing the test, I checked my answers. Rule: Use a comma after an introductory phrase.
I studied for hours but I still felt unprepared.
I studied for hours, but I still felt unprepared. Rule: Use a comma before a coordinating conjunction (FANBOYS) when joining two complete sentences.
My brother who lives in New York is visiting this weekend.
My brother, who lives in New York, is visiting this weekend. Rule: Use commas to set off nonessential (extra) information.
We need to bring pencils paper and calculators to the exam.
We need to bring pencils, paper, and calculators to the exam. Rule: Use commas to separate items in a series (list).
Although she was tired she stayed up late to study.
Although she was tired, she stayed up late to study. Rule: Use a comma after a dependent clause at the beginning of a sentence.
The movie was exciting however it was too long.
The movie was exciting; however, it was too long. Rule: Use a semicolon + comma with a conjunctive adverb (e.g., however, therefore).
Before the game started the players warmed up on the field.
Before the game started, the players warmed up on the field. Rule: Use a comma after an introductory clause.
My teacher said you need to revise your essay.
My teacher said, “You need to revise your essay.” Rule: Use a comma to introduce a direct quotation.
Students who study regularly perform better on tests.
Students who study regularly perform better on tests. (No comma needed)Rule: Do not use commas with essential information (it defines which students).
In conclusion students should prepare early for exams.
In conclusion, students should prepare early for exams. Rule: Use a comma after introductory words/phrases (e.g., “In conclusion,” “However,”).
