Grammarly
Grammarly Blog: Parentheses and Brackets
Rules and examples for using parentheses and brackets correctly in sentences.
Other
Grammar Book: Parentheses and Brackets
Included on this site are three rules for correct usage of parentheses, along with examples for all of the rules, and a quiz.
University of Calgary
University of Calgary: Parentheses and Rules for Use
This site contains information regarding the correct usage of parentheses in original material and in quoted material. Examples are included for all points discussed.
Grammarly
Grammarly Handbook: Brackets
This page explains the various types of brackets including parentheses (), square brackets [], curley brackets {}, and Chevron brackets . It also explains their uses and provides examples.
University of Victoria (Canada)
The U Vic Writer's Guide: Knowing the Basics of Grammar
This grammar tutorial for college students features help on verb agreement, the use of semicolons, sentence structure, and more.
Grammarly
Grammarly Blog: Comma Before Parenthesis
This page explains the proper use of commas with parenthesis: no comma before a parenthesis, no comma after a parenthesis unless it is needed for another reason such as a long introductory clause in a complex sentence, and no commas if...
Capital Community College Foundation
Guide to Grammar and Writing: The Period
An excellent resource detailing the uses and rules of the grammatical element "the period." Also includes information about the period in sentences, quotation marks, parentheses, and abbreviations.
University of Victoria (Canada)
The U Vic Writer's Guide: Grammar: Parentheses
This site contains information regarding the correct usage of parentheses, along with examples.
University of Victoria (Canada)
Study Zone: Forming the Simple Past Tense (Regular Verbs)
Students type the past tense of verbs in parentheses into the boxes provided throughout the paragraph and then check answers.
Other
Sta: Punctuation and Capitalization Rules
Use this handy guide for a quick reference to punctuation and capitalization rules. Includes rules for end marks, apostrophes, capitalization, commas, quotation marks, and many more!
University of Victoria (Canada)
Study Zone: Present Perfect 1: Form
Students type the present perfect form of the verbs in parentheses using the boxes provided throughout a paragraph.