Grammar and Punctuation That Actually Sticks
Punctuate with confidence, fix comma splices and stray apostrophes, and know which rules are law and which are house style.
This course is for members
$9 unlocks every course in the library, this one included, plus a credit to build a topic of your own and at least 10 new courses every month.
What you will learn about Grammar and Punctuation Refresher
The 7-day sprint
- Find the Clause. Every sentence is built on at least one independent clause, a group of words with a subject and a verb that could stand alone.
- Join Two Clauses Without Breaking Them. Two independent clauses can be joined in exactly a few legal ways, and a lone comma is not one of them.
- Commas That Set Things Off. Commas mark material that is extra, whether it comes before the main clause or sits inside it.
- Series, Serial Commas, and Stacked Adjectives. Items in a series need separators, and when the items already contain commas you promote the separator to a semicolon.
- Colons and Dashes. A colon must follow a complete sentence and points forward to what it introduces; a dash outranks a comma and can bracket material that already contains commas.
- Apostrophes and Possessives. An apostrophe marks possession or an omitted letter, and possessive pronouns never take one.
- Hyphens, Active Voice, and the Clarity Test. Where the rules run out, the deciding question is whether the reader can tell who did what and which words belong together.
The 80/20: the 7 concepts that matter most
- The independent clause test
- The comma splice and its four repairs
- Essential versus extra
- Apostrophes mark possession or omission, never plurals
- Mark ranking: comma, semicolon, colon, dash
- Hyphens as joiners, judged by clarity
- Active voice and naming the doer
The core idea, explained like you are 5
A sentence is made of clauses, and punctuation is the set of signals that tells a reader where each clause starts and stops and how the pieces relate.
Then the quiz and the ladder
10 questions that correct you when you are wrong, and beginner, intermediate, advanced levels, each with a practical exercise.
Created Sep 13, 2026. No mistakes have been reported by learners.
Written from these sources
- The Chicago Manual of Style, 18th Edition, chicagomanualofstyle.org. serial comma since 1906 and the ampersand exception.
- chicago manual style explained, news.uchicago.edu. Chicago versus Oxford versus AP style contrasts.
- Oxford, Chicago, and the Serial Comma - CMOS Shop Talk, cmosshoptalk.com. serial comma terminology note.
- owl.purdue.edu, owl.purdue.edu. six core comma rules and FANBOYS for days 2 to 4.
- extended rules for commas, owl.purdue.edu. day 2 example sentences joining independent clauses.
- Punctuation in Types of Sentences - Purdue OWL, owl.purdue.edu. clause definitions and introductory clause order rule.
- owl.purdue.edu, owl.purdue.edu. serial comma convention, dates, comma splice fixes.
- Run-ons - Comma Splices - Fused Sentences - Purdue OWL, owl.purdue.edu. run-ons, splices and fused sentences as one failure.
- identifying independent and dependent clauses exercise, owl.purdue.edu. the four-way comma splice repair menu.
- Semicolons, colons, and dashes - UNC Writing Center, writingcenter.unc.edu. semicolon image, super-comma fruit list, colon gate rule.
- The Writing Center Semi-colons, colons, and dashes What this handout is about, writingcenter.unc.edu. dash versus comma example and dialogue dashes.
- The Writing Resources Corner | Punctuation: Em Dashes vs. Colons, pages.charlotte.edu. em dash versus en dash distinction in day 5.
- Semicolons, Colons, and Dashes - Wheaton College, wheaton.edu. colon mechanical uses and the ingredients-list error.
- GPO STYLEMANUAL 2016 10, govinfo.gov. punctuation philosophy and possessive rules 8.3 to 8.5.
- GPO STYLEMANUAL 2000 12, govinfo.gov. descriptive versus possessive and possessive pronoun list.
- 193 8. Punctuation 8.1., govinfo.gov. confirming possessive examples across editions.
- FAQS: The Government Printing Office Style Manual » Community | GovLoop, govloop.com. GPO requires the serial comma at 8.42.
- Apostrophes | Style Manual, stylemanual.gov.au. apostrophe placement procedure and plurals of abbreviations.
- AP sparks linguistic pandemonium with hyphen guidance update - Columbia Journalism Review, cjr.org. hyphens as joiners and compound modifier definition.
- AP changes guidance on the hyphen. Again. - Poynter, poynter.org. AP 2019 hyphen reversal and misreading correction.
- AP hyphen outrage continues with guidance update - Columbia Journalism Review, cjr.org. first-quarter touchdown hyphen restored.
- Associated Press style changes: Why grammar nerds keep getting furious at the AP, and why they’re wrong., slate.com. AP clarity test and small-business owner example.
- To Hyphenate or Not? An Editing Guide - Siege Media, siegemedia.com. no hyphen after -ly adverbs, before versus after noun.
- Plain Language, opm.gov. plain language qualities and active voice guidance.
- plainlanguage.gov/_pages/guidelines/conversational/use-active-voice.md at main · GSA/plainlanguage.gov, github.com. passive voice two-feature test and before/after pairs.
- Writing for understanding | Digital.gov, digital.gov. current phrasing of the active voice guidance.
- OFFICE OF COMPLIANCE INITIATIVES UNITED STATES DEPARTMENT OF LABOR, dol.gov. day 7 proofreading checklist and word substitutions.
- Plain language guidelines | Governor Bob Ferguson, governor.wa.gov. be-verb screening heuristic and bill example.
- THEY Definition & Meaning - Merriam-Webster, merriam-webster.com. Singular they usage guidance in advanced lesson.