Grammar-Check Quick List

Grammar errors slip into every draft, but a rapid checklist turns chaos into clarity. This guide gives you a portable, high-impact grammar-check quick list you can apply sentence by sentence.

Each item below is battle-tested against real editing workflows, so you can move from first draft to polished prose without second-guessing every comma.

Subject–Verb Agreement in One Glance

Scan left to right until you hit the main verb; then ask, “Who is doing this?” If the answer is plural, the verb must pluralize too. “The range of options vary widely” fails because “range,” not “options,” governs the verb.

Interrupting phrases such as “along with,” “as well as,” or “together with” never change the grammatical subject. Strike them mentally and read the sentence aloud without them: “The CEO, together with the board, approves the budget” stays singular.

Collective nouns—team, family, committee—take a singular verb when acting as one unit. Swap in a pronoun test: if you would write “it decides,” keep the singular verb.

Pronoun Precision Without Charts

Find every pronoun, arrow back to its antecedent, and verify three traits: number, gender, and clarity. “When Alex dropped the laptop, he winced” works only if Alex is male; otherwise the pronoun mislabels.

Avoid hidden antecedents like “this” or “which” that point to entire ideas. Replace with a noun: “This strategy shortens meetings” beats “This shortens meetings.”

Reflexives must reflect; “Please send the file to myself” breaks the rule because nobody is reflecting an action back. Write “to me” and move on.

Indefinite Pronoun Traps

“Everyone,” “each,” and “nobody” feel plural but are singular. Pair them with singular verbs and later pronouns: “Everyone brings his or her passport,” not “their.”

If the singular sounds clumsy, pluralize the noun instead: “All travelers bring their passports” sidesteps the gender question entirely.

Comma Compass for Speed

Drop a comma where you’d breathe if reading aloud to a child—natural but not dramatic. If the pause feels shorter than a heartbeat, lose the comma.

Coordinate adjectives need commas; cumulative ones don’t. Test by reversing order or inserting “and”: “a long, difficult meeting” reverses to “a difficult, long meeting,” so keep the comma.

Non-restrictive clauses always hug commas. “My brother, who lives in Oslo, is visiting” tells us you have one brother; remove the commas and you imply multiple brothers.

Comma Splices in the Wild

Two independent clauses glued by a comma create a splice. Swap the comma for a semicolon, add a conjunction, or split into two sentences.

Example fix: “The report is late, we need an update” becomes “The report is late; we need an update.”

Apostrophe Accuracy Under Ten Seconds

Apostrophes either contract or possess—never pluralize. “CPU’s overheat” should be “CPUs overheat” unless the CPU owns something.

For joint possession, attach the apostrophe to the final name: “Ari and Priya’s codebase” signals shared ownership. Separate possession needs each name tagged: “Ari’s and Priya’s laptops” means two devices.

Decades skip apostrophes: “the 1990s,” not “the 1990’s.” The decade isn’t owning anything.

Modifier Placement That Prevents Ridicule

Limiting modifiers—only, just, nearly—bind to the word they touch. Move “only” early and you change meaning: “Only I tested the backup” means no one else did.

Squinting modifiers sit between two possible targets. “Staff who cancel meetings frequently annoy clients” leaves us wondering which action is frequent. Reposition: “Staff who frequently cancel meetings annoy clients.”

Dangling modifiers open sentences with no logical subject. “Walking to the server room, the lights went out” implies the lights were walking. Add the actor: “Walking to the server room, I noticed the lights went out.”

Parallel Structure for Instant Rhythm

Lists demand matching grammatical outfits. “She enjoys coding, to hike, and podcasts” jars the ear; align to gerunds: “coding, hiking, and podcasting.”

Correlatives such as “either/or” and “not only/but also” must link grammatically identical items. “Not only was the API fast but also reliable” fails; pair adjectives: “Not only was the API fast but also reliable” becomes “The API was not only fast but also reliable.”

Headings in documents secretly test parallelism. If section one is “Installing the Plugin,” section two can’t be “Configuration of Theme”; match to “Configuring the Theme.”

Tense Consistency at a Glance

Pick a reference time and calendar every verb against it. In procedural text, present tense rules: “Click Save, and the system stores your data.”

Flashbacks need past perfect once, then simple past thereafter. “She had rebooted the server, then watched the logs settle” keeps the timeline clear without repeated “had.”

Conditional chains require matching halves. “If the cache overflowed, the app crashes” mixes past and present; align to “If the cache overflows, the app crashes.”

Voice Choice Without Overwhelm

Active voice shortens sentences and front-loads responsibility. “The developer deployed the patch” uses eight words; passive “The patch was deployed by the developer” needs ten and hides the actor until the end.

Reserve passive for three scenarios: unknown actor, irrelevant actor, or deliberate deflection. “Data was encrypted during transit” stresses the action, not the encryptor.

Spot passive fast by adding “by zombies” after the verb; if the sentence still makes sense, it’s passive. “The ticket was closed by zombies” signals a rewrite.

Capitalization Micro-Checklist

Proper nouns alone earn capitals; common nouns like “company” or “city” stay lowercase unless part of a formal name. “City of London” is capped, but “the city of London” isn’t.

Job titles dilute when they follow names. “Vice President Patel called” keeps the cap; “Patel, vice president of sales, called” downgrades it.

Cardinal directions shrink unless part of a place name. “Drive north on Route 66, then enter Northern Arizona” shows the split.

Hyphen vs. Dash Speed Test

Hyphens fuse, en dashes span, em dashes interrupt. “A high-risk investment” needs a hyphen; “pages 12–15” take an en dash; “The server—overloaded—crashed” uses em dashes.

No space surrounds hyphens or em dashes; en dashes in number ranges keep clean neighbors. Mac shortcuts: option-hyphen for en, shift-option-hyphen for em.

Auto-format often swaps double hyphens into em dashes; scan to confirm the replacement didn’t leave spares.

Number Style in 30 Seconds

Spell out one to nine; use digits for 10 and above, unless the number opens a sentence. “Twenty-two users clicked” keeps spelled form; “22 users clicked” also works and looks cleaner.

Keep units with digits: “5 GB,” not “five GB.” Consistency trumps alternating styles within a paragraph.

Ranges abbreviate logically: “5–10 Mbps” uses an en dash and repeats the unit symbol only if it could confuse: “pages 30–35” needs no second “p.”

Semicolon Spot Checks

Semicolons divorce closely linked independent clauses that could stand alone but feel too thin separately. “The QA suite passed; the staging deploy failed” shows contrast without a conjunction.

Complex lists with internal commas demand semicolon separators. “We invited Alice, the lead; Bob, the architect; and Carol, the PM” prevents Alice-and-Bob pairing confusion.

Avoid semicolons before coordinating conjunctions; save them for moments where the conjunction is absent or the list is complex.

Colon Power Moves

Colons act like spotlights: they announce specifics after complete thoughts. “She had one goal: zero downtime” works; “Her goals were: zero downtime” fails because the preamble is incomplete.

Capitalize after a colon only if what follows is a proper noun or multiple complete sentences. “He promised this: The API will be fast. It will also be secure” keeps both clauses capitalized.

Never place a colon between a verb and its object or a preposition and its complement. “The stack includes: Node, React, and Mongo” breaks the rule; delete the colon.

Quotation Mark Hygiene

Punctuation goes inside quotes when it belongs to the quoted matter. She said, “The deadline is Friday” places the comma inside.

When quoting a single word or scare-quoting, punctuation stays outside: “The so-called ‘quick fix’”, keeps the comma external because the quote is linguistic, not spoken.

Technical strings such as file paths or passwords stay quote-free to avoid escape confusion; use code formatting instead.

Redundancy Radar

Phrases like “advance planning,” “end result,” and “free gift” carry built-in duplicates. Delete the first word and meaning holds.

“Currently” and “at this time” rarely earn their space; timestamp the action or skip the adverb. “The server is currently down” tightens to “The server is down.”

Watch sneaky twins: “each and every,” “null and void,” “pick and choose.” Pick one; void the other.

Preposition Pruning

Preposition stacks inflate sentences. “A reduction in the amount of” collapses to “a reduction in.”

“Of” is the worst offender; search your draft for “of” and rephrase possessives or nominalizations. “The opinion of the manager” becomes “the manager’s opinion.”

Phrasal verbs often swap for single strong verbs. “Look into” becomes “investigate,” “come up with” becomes “devise.”

Final Two-Minute Sweep

Run a search for “there is,” “there are,” “it is,” and “this is” to spot lazy openers. Flip to concrete subjects: “Three warnings appear” beats “There are three warnings.”

Read the last sentence of every paragraph in isolation; if it lacks punch or clarity, rewrite. Strong endings prevent paragraphs from dissolving into mush.

Print the piece, change the font, or read backwards paragraph by paragraph to trick your brain into fresh eyes. Errors that survived on-screen rarely survive paper.