Plain-English grammar, one guide at a time.
Detailed grammar guides for real editing decisions — punctuation, word choice, sentence structure, spelling, and professional writing.
Choose a focused editing path
Start with the decision that is slowing down your draft, then use the linked guide to test the sentence in context.
Affect vs Effect: How to Choose
Choose affect for the usual verb meaning influence and effect for the usual noun meaning result, then check the two important exceptions.
Subject-Verb Agreement: Rules & Tricky Cases Explained
Subject-verb agreement: Singular subjects need singular verbs, plural subjects need plural verbs. Master tricky cases like collective nouns and...
Between vs Among, Fewer vs Less: Usage Guide
Learn between vs among and fewer vs less with clear examples for distinct choices, groups, count nouns, amounts, comparisons, and practical...
Comma Rules and English Punctuation Guide
Learn comma rules, apostrophe rules, and English punctuation with clear examples for lists, clauses, quotations, semicolons, colons, and boundaries.
Could, Would, and Should: A Modal Verb Guide
Learn when to use could, would, and should for polite requests, advice, possibility, conditions, and clear English writing with real examples and...
E.g. vs I.e. and Academic Writing Words
Learn e.g. vs i.e., imply vs infer, and precise academic writing words with examples for definitions, evidence, measured claims, and careful...
Core Sentence Rules for Stronger English
A sentence-structure pillar page covering subjects, verbs, agreement, fragments, run-ons, modifiers, articles, clauses, and parallel structure.
Prepositions and Spacing in English Word Pairs
A spacing and preposition hub for a lot, any time, every day, into/in to, login/log in, setup/set up, and related patterns.
Similar-Sounding Words That Change Meaning
A writing guide for similar-sounding words such as bemused/amused, elicit/illicit, envy/jealousy, and poisonous/venomous.
A vs An: Choose the Article by Sound
Choose a or an by the opening sound of the next word, with examples for silent h, vowel letters, initialisms, and pronunciation-dependent cases.
Advice vs Advise: What's the Difference?
Advice vs advise: advice is the noun, and advise is the verb. Learn the difference, meaning, and examples with a fast memory trick.
Anymore vs Any More: Modern Usage Explained
Anymore vs any more: anymore means no longer, while any more refers to an additional amount. Learn the quick test and examples.
Apostrophe Rules for Contractions and Possession
Use apostrophes for contractions, noun possession, and limited clarity cases—not ordinary plurals. Learn singular, plural, and possessive-pronoun...
Articles with Proper Nouns
Choose the or zero article with countries, rivers, mountains, lakes, buildings, and institutions by checking the name category and shape.
Comma Before "And": When You Need It (And When You Don't)
Comma before 'and': style-dependent in lists, generally used between independent clauses, and normally omitted in a compound subject or predicate.
Comparative vs Superlative
Learn how comparative and superlative forms work, including -er/-est, more/most, irregular forms, and the traditional rule for comparing two items.
Could vs Would vs Should: Meaning and Examples
Could, would, should: compare ability and possibility, imagined results and willingness, and advice or expectation with contextual examples.
Countable vs Uncountable Nouns
Compare countable and uncountable noun uses, including a/an, plural forms, quantifiers, agreement, meaning changes, and countable units.
Do vs Make: What's the Difference?
Do vs make: use do for actions, tasks, and activities; use make for creating or producing something. Learn the rule, the common collocations, and...
E.g. vs. I.e.: Meaning, Examples, and Punctuation
E.g. vs i.e.: use e.g. for examples and i.e. for restatement. Learn the difference, punctuation, and a simple test for choosing the right one.
Everyday vs Every Day: Which One Should You Use?
Everyday vs every day: everyday is an adjective meaning ordinary; every day means each day. Learn the one-word vs two-word test.
Gerunds vs Infinitives: Verb Patterns and Meaning
Gerunds vs infinitives: when to use -ing (swimming) or to + verb (to swim). Includes verb lists, meaning-change verbs like stop and remember, and...
Hangar vs Hanger: What's the Difference?
Hangar vs hanger: a hangar is a large building for aircraft; a hanger is the hook you hang clothes on. Learn the difference with a simple spelling...
Hyphenation Rules: When to Use Hyphens
Use a three-pass hyphenation check for compound modifiers, -ly adverbs, numbers, and prefixes, with sourced exceptions and checker limits.
I vs Me: Subject, Object, and the Removal Test
Choose I for a subject and me for an object. Use the removal test for compound phrases, with sourced guidance for between, than, and it's me.
Irregular Plurals: Patterns, Variants, and Examples
Irregular plurals: learn vowel changes, -en forms, unchanged nouns, and borrowed-word variants, with direct dictionary evidence and checker tests.
Led vs Lead: What's the Difference?
Choose led or lead by checking tense, grammatical role, and pronunciation. See sourced definitions, contextual examples, and an exact checker...
Lightning vs Lightening: A Word-Class Test
Choose lightning or lightening by testing the word's job: storm noun, speed adjective, or the -ing form of lighten. Includes sourced edge cases...
Login vs Log In: Grammar for Tech Writing
Use login as a noun and log in as a verb. Compare log in to with log into, product-style alternatives, examples, and an exact checker limitation.
Lose vs Loose: What's the Difference?
Use lose for a verb such as misplace or fail to win. Use loose for not tight or free, and compare lost, loosed, pronunciation, and an exact...
Moral vs Morale: A Meaning-and-Role Test
Choose moral or morale by testing ethics, story lessons, confidence, pronunciation, and dictionary overlap. Includes exact checker limits.
Much vs Many: What's the Difference?
Much vs many: use many with countable plural nouns and much with uncountable nouns. Learn the rule, how many vs how much, and clear examples that...
Passive Voice: Identify It and Rewrite It Safely
Identify passive voice by tracing the affected subject, auxiliary, participle, and optional agent. Then rewrite it without losing tense or meaning.
Past Perfect vs Past Perfect Continuous
Choose between had done and had been doing with result, duration, verb-type, and timeline tests, plus exact checker limitations.
Peak vs Peek vs Pique: Choose by Meaning and Role
Choose peak, peek, or pique by meaning and sentence role. Compare maximums, brief looks, aroused interest, inflections, phrases, and examples.
Peddle vs Pedal
Choose peddle or pedal by testing selling, promotion, foot controls, word class, compounds, and the forms peddled, pedaled, and pedalled.
Phrasal Verbs: What They Are and How to Use Them
Classify phrasal and related multi-word verbs by object pattern. Compare separable, prepositional, and three-part forms with an exact checker test.
Premier vs Premiere: Roles, Variants, and Debuts
Choose premier or premiere by word class and meaning. Compare rank, government, debut nouns and verbs, dictionary variants, and an exact checker...
Preposition Rules: Complements, Time, Place, and Movement
Edit prepositions by checking the complement, time or place meaning, movement, dependent pattern, and register—with direct sources and an exact...
Present Perfect vs Simple Past
Choose present perfect or simple past by testing the reference time, present connection, and whether the time window is still open.
Prophecy vs Prophesy: Roles, Sounds, and Forms
Choose prophecy or prophesy by sentence role, pronunciation, and inflection. Includes the less-common noun variant, sourced boundaries, and an...
Quotation Marks: Direct Speech, Titles, and Punctuation
Use quotation marks for direct speech, nested quotations, titles, and questioned wording by separating grammar from US, British, and house style.
Reflexive Pronouns: A Function Test for <em>Myself</em> and <em>Me</em>
Decide when myself, yourself, and themselves refer back to a subject, add emphasis, mean alone, or need an ordinary object pronoun instead.
Regardless vs Irregardless: Standard Status and Meaning
Irregardless is a real, nonstandard word with the same meaning as regardless. Learn the edited-writing default, sentence frames, and exact checker...
Rein vs Reign vs Rain: Roles, Idioms, and Forms
Choose rein, reign, or rain by meaning, word class, idiom, and inflection. Includes free rein, rein in, reign supreme, and an exact checker result.
Relative Clauses: Meaning, Pronouns, and Commas
Audit relative clauses by reference, clause type, pronoun role, omission, and punctuation. Includes sourced boundaries and an exact checker...
Say vs Tell
Choose say or tell by checking the listener, message, clause, command, and fixed expression. Includes direct Cambridge sources and a tested...
Semicolon Usage: Clauses, Transitions, and Complex Lists
Use semicolons between connected independent clauses, with conjunctive adverbs, and in complex lists. Learn the conjunction and colon boundaries.
Sentence Fragments
Find sentence fragments by locating the independent clause, subject, and main verb. Repair dependent clauses, detached phrases, and mixed...
Types of Sentences by Structure
Classify simple, compound, complex, and compound-complex sentences by counting clauses, separating structure from purpose, and testing exact...
Setup vs Set Up: One Word or Two?
Choose setup or set up by grammatical job, then check noun modifiers, verb tense, pronoun placement, passive forms, and US versus UK spelling.
Since vs For
Choose since or for by mapping a starting point or duration, then check clauses, tense, bounded ranges, and the reason sense of since.
Some vs Any
Choose some or any by checking polarity, question intent, negative scope, free choice, noun type, and the limits of automated checking.
Sometime vs Some Time vs Sometimes
Choose sometime, some time, sometimes, or some times by meaning and grammar. Includes duration, unknown-point, former, and checker boundaries.
Stationary vs Stationery: What’s the Difference?
Choose stationary or stationery by grammatical job. Covers writing materials, countability, stationery stores, technical time series, and checker...
Tense Consistency: Audit the Timeline, Not Just the Verb Endings
Audit tense consistency by reference time, not a one-tense rule. Covers status timelines, literary analysis, reported speech, and checker limits.
Then vs Than: A Clause-and-Meaning Guide
Choose then or than by testing time, sequence, consequence, comparison, and the full clause. Includes exact checker evidence and five boundary cases.
There Is vs There Are
Choose there is or there are by noun number, handle uncountable nouns and mixed lists, and see the exact agreement error the checker missed.
This, That, These, Those: A Reference-and-Agreement Guide
Choose this, that, these, or those by separating number agreement from spatial, temporal, and discourse reference. Includes exact checker limits...
To vs Too vs Two: A Sentence-Slot Guide
Choose to, too, or two by testing the sentence slot, meaning, and nearby words. Includes exact checker evidence, boundary cases, and a five-step...
Used To vs Would for Past Habits
Choose used to, would, or the simple past for former states, repeated actions, single events, and framed narratives with sourced examples and a...
Waist vs Waste: Meaning and Context Tests
Choose waist or waste by meaning and sentence role: body middle, poor use, unwanted material, a verb, or a before-noun modifier. Includes exact...
Wander vs Wonder: Movement, Attention, and Curiosity
Choose wander or wonder by testing movement, drifting attention, curiosity, surprise, and sentence frame. Includes direct sources and exact...
Wary vs Weary: Caution, Fatigue, and Sentence Frames
Choose wary or weary by testing caution, physical fatigue, lost patience, word class, and the sentence frame. Includes direct sources and exact...
Weather vs Whether: Meaning, Grammar Frames, and If Limits
Choose weather or whether by testing word class, meaning, whether-or-not frames, prepositions, and to-infinitives. Includes sources and exact...
What Is a Noun? Find the Head of the Phrase
Identify nouns by finding the head of a noun phrase, separating word class from sentence role, and checking reference, countability, and agreement.
What Is a Pronoun? Reference, Case, Possession, and Reflexives
Learn how pronouns work as noun phrases, how subject and object case differ, when a word is a determiner, how singular they works, and why dummy...
What Is a Verb? Identify the Whole Verb Phrase
Identify main, linking, auxiliary, modal, finite, and non-finite verbs by finding the whole verb phrase. Includes form tests, clause boundaries,...
What Is an Adjective? Test the Sentence Slot
Identify adjectives before nouns, after linking verbs, and as object complements. Includes suffix limits, adjective order, and exact checker evidence.
What Is an Adverb? Trace Its Target and Scope
Identify what an adverb modifies, test its scope, and place it at the front, middle, or end of a clause. Includes exact checker evidence.
When to Replace Very—and When to Keep It
Audit very by grammar and meaning. Keep legitimate degree, exact-noun, and softening uses; replace vague emphasis with accurate words or measurements.
Where vs Were: Choose by the Sentence Job
Choose where, were, or we're by the sentence job: place relation, past form of be, or we are. Use the slot test, sourced examples, and honest...
Which vs That: Decide Meaning Before Style
Choose which or that by deciding clause meaning, punctuation, grammatical role, and house style. Includes restrictive which and exact checker limits.
Who vs That: People, Clause Type, and Omission
Choose who or that by checking the antecedent, clause type, grammatical role, and omission. Includes direct sources and exact checker evidence.
Who vs Whom: Case, Clause Role, and Register
Choose who or whom by rebuilding the smallest clause, checking subject or object role, and accounting for register and preposition placement.
Whoever vs Whomever: Test the Inner Clause
Choose whoever or whomever by separating the whole clause's job from the pronoun's role inside it. Includes nested-think cases and exact checker...
Whose vs Who's: Test Possession Against Expansion
Choose whose or who's by testing possession against who is and who has. Learn the three whose patterns, tricky expansions, repairs, and checker...
Will vs Going To: Choose the Future View
Choose will or going to by separating immediate decisions, prior intentions, present evidence, predictions, promises, and fixed arrangements.
Will vs Shall: Choose the Speech Act and Register
Choose will or shall by speech act, person, register, and drafting authority. Separates offers, suggestions, future questions, and legal duties.
Action and State Verbs
A verb-focused writing hub for action verbs, state verbs, gerunds, infinitives, lay/lie, breath/breathe, and tense choices.
Business Email Vocabulary for Clear Workplace Writing
A practical workplace writing hub for choosing precise business email words, fixing tone mismatches, and editing requests, updates, and follow-ups.
Commonly Misspelled Word Combinations
A spelling-focused hub for word combinations such as lose/loose, where/were, a lot/allot, and apostrophe pairs in public copy.
Exact Homophones: Same Sound, Different Meaning
A homophone decision guide for words that sound the same but carry different meanings, including to/too/two, weather/whether, and principal/principle.
Movement and Direction Words in English
A direction-focused writing hub for emigrate/immigrate, farther/further, into/in to, and other movement words in practical English.
Possessives and Contractions With Apostrophes
A practical apostrophe hub for its/it's, your/you're, their/there/they're, whose/who's, possessive forms, and contraction tests.
Pronoun Cases for Clear Sentence Roles
A practical pronoun case hub for I/me, who/whom, whoever/whomever, relative clauses, and subject/object roles in polished essays, reports, and emails.
Time and Progression Words for Clear Sequence
A sequence-focused writing hub for then/than, passed/past, tense consistency, and time markers that guide readers through events.
Active vs Passive Voice: Choosing Emphasis
Active vs Passive Voice: Discover when to use each voice to strengthen your writing. Learn real-world editing strategies for business, academic,...
Continually vs Continuously: Stop Confusing Them
Continually vs Continuously: Learn to distinguish repeated actions from unbroken duration. Master the grammatical differences with memory tricks...
Fewer vs Less: The Edited Default and Its Exceptions
Fewer vs less: use fewer as the edited default for counts and less for amounts, while accounting for accepted count-noun uses of less.
Historic vs Historical: What's the Difference?
Historic vs Historical: Learn how to choose between these commonly confused adjectives with definitions, memory tricks, usage notes, and clear...
Hyphen, En Dash, and Em Dash: The Complete Guide
Learn when a hyphen joins words, an en dash marks a range or relationship, and an em dash marks a break in a sentence, with clear examples.
In vs On vs At for Time and Place
Choose in, on, or at for time and place with a practical scope-and-specificity guide, common idioms, and documented checker limits.
Its vs It's: What's the Difference?
Its vs it's: IT'S always means 'it is' or 'it has' (it's raining). ITS shows possession with no apostrophe (the cat licked its paw).
Run-On Sentences: Fix Comma Splices and Fused Sentences
Run-on sentences: Learn to identify and fix fused sentences and comma splices. Use periods, semicolons, or conjunctions to separate complete thoughts.
Their vs There vs They're: The Simple Rule
Their shows possession, there marks place or existence, and they're expands to they are. Use three sentence-job tests and documented checker limits.
Your vs You’re: The Simple Rule
Your vs you're: YOUR shows possession (your book). YOU'RE is 'you are' (you're welcome). Expand the contraction to check: Does 'you are' work?
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Focused Grammar Guides
Use these focused guides when a single high-frequency grammar decision is blocking an edit.
Subject-Verb Agreement
Match the verb to the true subject, not the nearest noun.
Run-On Sentences
Fix comma splices, fused sentences, and long clauses that need clearer joining logic.
Affect vs Effect
Separate influence from result in reports, analysis, policy summaries, and everyday writing.
Their vs There vs They're
Choose the right form for ownership, location, existence, or they are.
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