English grammar lessons sit at the crossroads of two worlds. ESL learners want the rules clearly mapped so they can build sentences that sound natural. Native speakers want to polish habits that school never quite drilled in. Both groups land on the same questions: when do you use who versus whom, why does fewer apply to apples but less to water, and how does the present perfect differ from the simple past?
This guide answers those questions and dozens more. It walks through the eight parts of speech, the twelve verb tenses, the four sentence types, punctuation rules that trip up almost everyone, and the common errors graders flag first. The lessons follow the order most ESL textbooks use. The explanations stay practical for anyone preparing for a school exam, a standardized test, or a job interview where writing matters.
Free practice material lives at the bottom of the page. Before you get there, the sections below cover the structural ingredients of every English sentence, the conjugation patterns that turn verbs into past, present, and future, and the punctuation marks that signal meaning beyond words. The English grammar test at the end gives you a free way to check your progress against typical exam questions.
Every English word belongs to one of eight categories. Knowing which category a word fits decides how you spell it, how you use it, and which other words can sit next to it. The eight are nouns, pronouns, verbs, adjectives, adverbs, prepositions, conjunctions, and interjections. Some grammar books split articles off as a ninth, but most modern guides treat a, an, and the as a type of adjective.
Words sometimes change category depending on use. Run is a verb in I run every morning and a noun in I went for a run. Light is an adjective in a light meal, a noun in turn on the light, and a verb in light the candle. Spotting the category in context is what standardized tests like the SAT, ACT, and TOEFL ask. For ACT preparation, see our ACT exam page which breaks down the English subscore.
People, places, things, ideas. Proper (Maria, London), common (teacher, city), abstract (love, freedom), collective (team, family).
Stand in for nouns. Subject (I, he, she), object (me, him), possessive (mine, his), reflexive (myself), relative (who, that).
Action (run, eat), linking (be, seem, become), helping (have, do, will). Regular add -ed; irregular change form (go went gone).
Descriptive (red, tall), possessive (my, your), demonstrative (this, that), indefinite (some, any). Modify the nearby noun.
Manner (quickly), time (yesterday), place (here), degree (very). Answer how, when, where, and how much.
The big six: in, on, at, to, from, with. Others include under, over, between, through, against, around.
Coordinating: FANBOYS (For, And, Nor, But, Or, Yet, So). Subordinating: because, although, while, since.
Express emotion. Wow, ouch, oh, hey, hmm. Stand outside the sentence grammatically.
Nouns name something. The category sounds simple until you start sorting them. Proper nouns name a specific person, place, or thing and always start with a capital letter: Sarah, Tokyo, iPhone, December. Common nouns name a general category and stay lowercase unless they begin a sentence: student, city, phone, month.
The distinction matters because proper nouns rarely take articles. You say Sarah is here, not the Sarah is here. You say I live in Tokyo, not I live in the Tokyo. Country names mostly skip the too, with the famous exceptions of the United States, the United Kingdom, and the Netherlands.
Abstract nouns name something you cannot touch: love, freedom, justice, fear. They almost never appear in the plural. Collective nouns name a group: team, family, jury, committee. American English usually treats collective nouns as singular (the team is winning); British English sometimes treats them as plural.
Countable nouns can be pluralized (one book, two books). Uncountable nouns cannot (water, rice, information, furniture). ESL learners slip here because some languages pluralize nouns English treats as uncountable. Informations is wrong. Say pieces of information instead. Our learn English overview links to vocabulary drills on this split.
English has roughly 200 irregular verbs in common use. About 50 appear in almost every paragraph: be, have, do, say, go, get, make, know, take, see, come, think, want, give, find, tell. Drill these as past tense and past participle pairs (go-went-gone, see-saw-seen) before you study tenses, because every tense above the simple present depends on knowing the right past form. Free flashcard sets at British Council LearnEnglish, BBC Learning English, and EnglishGrammar.org cover all 200 with audio.
Pronouns let you avoid repeating the same noun. Instead of Maria called Maria's mother because Maria forgot Maria's keys, you write Maria called her mother because she forgot her keys. Five categories cover almost every situation.
Subject pronouns do the action: I, you, he, she, it, we, they. They sit at the front of a clause. Object pronouns receive the action: me, you, him, her, it, us, them. They sit after the verb or a preposition. She called me, she gave it to him. Mix these up and the sentence sounds off: her called I never works.
Possessive pronouns stand alone: The book is mine. Possessive adjectives sit before a noun: my book is on the table. The two categories share words for his and her, which trips up learners. Reflexive pronouns end in -self or -selves and point back at the subject: I hurt myself, they introduced themselves. The common error: please contact myself should be please contact me.
Relative pronouns connect a dependent clause to the main sentence: who, whom, whose, which, that. Use who for people as subject (the teacher who taught me) and whom for people as object (the teacher whom I called). Quick test: replace with he or him. If he fits, use who. If him fits, use whom.
Verbs power every English sentence. Without a verb, there is no complete thought. Three categories cover the workload.
Action verbs describe physical or mental activity: run, eat, think, decide. They tell what the subject does. Linking verbs connect the subject to a description. The main one is to be, but also seem, become, appear, feel, taste, look, sound, smell. In the soup tastes good, tastes is a linking verb because nothing is doing the tasting. In I tasted the soup, tasted is an action verb. Same word, two roles.
Helping verbs, also called auxiliaries, team up with a main verb to form tenses, questions, and negatives. The big three are be, have, do. She is running uses is for continuous tense. I have finished uses have for perfect tense. Modal verbs (can, could, may, might, must, shall, should, will, would) work like helpers but add meaning rather than just structure.
Verbs come in regular and irregular flavors. Regular verbs add -ed for past (walk-walked-walked). Irregular verbs change form unpredictably (go-went-gone, eat-ate-eaten, be-was-been). The most common 100 irregular verbs cover 90 percent of daily English usage. Memorize them as a block early because guessing wrong is the most visible ESL mistake. I goed and he eated mark a beginner instantly.
Adjectives describe nouns. Adverbs modify verbs, adjectives, or other adverbs. The split sounds clean until you start writing. Many adjectives become adverbs by adding -ly: quick becomes quickly. Not all. Fast stays fast in both forms: a fast car (adjective), she runs fast (adverb). Hard and late follow the same pattern. Hardly and lately mean something completely different.
Adjectives split into four useful types. Descriptive (red, tall, intelligent), possessive (my, your, our), demonstrative (this, that, these, those), and indefinite (some, any, many, few). Adverbs answer four questions: how (manner: quickly), when (time: yesterday), where (place: here), and to what extent (degree: very).
One frequent mistake mixes adverbs and adjectives after linking verbs. After be, seem, feel, taste, use an adjective, not an adverb. Say I feel bad, not I feel badly. The exception is when you genuinely mean a manner: I feel badly with these gloves on means the gloves prevent good touch sensation.
Prepositions decide huge meaning with tiny words. Use in for enclosed spaces and longer time periods (in the room, in March). Use on for surfaces and days (on the table, on Tuesday). Use at for specific points and clock times (at the door, at 3pm). Use to for destination, from for origin, and with for accompaniment or instrument.
Conjunctions connect. The seven coordinating conjunctions form FANBOYS: For, And, Nor, But, Or, Yet, So. When they join two independent clauses, put a comma before the conjunction: I studied hard, but the exam was difficult. Subordinating conjunctions (because, although, while, since, if, when, before, after, until, unless) start a dependent clause that cannot stand alone. Because it rained, we stayed home.
Articles deserve focus. English has three: a, an, and the, plus the zero article. Use a before a consonant sound, an before a vowel sound. The rule depends on sound, not spelling: a university (y sound), an hour (silent h). Articles are the hardest topic for ESL learners from languages without them (Russian, Mandarin, Japanese). Drill them daily.
English has three time frames (past, present, future) and four aspects (simple, continuous, perfect, perfect continuous), giving twelve main tenses. Most ESL books teach them in this order: present simple, present continuous, present perfect, present perfect continuous, then the same four patterns for past and future.
Present simple describes habits and facts: She works at a hospital. Present continuous describes ongoing actions: She is working this week. Present perfect links past to present: I have lived here for three years. Present perfect continuous emphasizes duration: I have been studying for two hours.
Past simple describes completed past actions: She worked last year. Past continuous describes ongoing past actions: I was reading when the phone rang. Past perfect shows one action before another: By the time we arrived, the movie had started. Past perfect continuous emphasizes duration up to a past point.
The four future tenses follow the same pattern. I will study (simple), I will be studying (continuous), I will have studied (perfect), I will have been studying (perfect continuous). ESL students often skip the perfect forms because they sound complex, but they appear constantly in formal writing and standardized test passages.
English has five conditional patterns. Zero conditional states general truths: If you heat water, it boils. First conditional describes likely future events: If it rains tomorrow, I will stay home. Second conditional describes unreal present situations: If I won the lottery, I would buy a house. Third conditional describes unreal past situations: If I had studied harder, I would have passed. Mixed conditional combines an unreal past with a present result.
The passive voice flips the object of an active sentence into the subject. Active: The teacher graded the test. Passive: The test was graded by the teacher. Form: be + past participle. Use passive when the action matters more than the doer, when the doer is unknown, or when you want to soften focus. Scientific writing favors passive for objectivity. Style guides recommend keeping passive voice under 20 percent of sentences.
Modal verbs add meaning to a main verb. Can shows ability or permission. Could shows past ability or polite request. May shows permission or possibility. Might shows weaker possibility. Must shows obligation or strong probability. Should shows advice or expectation. Modals never take -s on he/she/it, and they never take to before the next verb.
Punctuation shapes meaning in ways word choice cannot. Let's eat, Grandma and Let's eat Grandma mean very different things. The comma in the first sentence saves Grandma.
The comma has more rules than any other mark. Use a comma before a coordinating conjunction joining two independent clauses (I went home, and I made dinner). Use commas to separate items in a list of three or more (red, white, and blue). The Oxford comma is the final one before and; American usage favors keeping it. Use commas around non-restrictive clauses (My brother, who lives in Tokyo, is a teacher). Do not use commas around restrictive clauses.
A comma splice joins two independent clauses with only a comma. I was tired, I went to bed is wrong. Fix it three ways: change to a semicolon (I was tired; I went to bed), add a coordinating conjunction (I was tired, so I went to bed), or split into two sentences.
The semicolon joins two related independent clauses without a conjunction. The colon introduces a list, explanation, or quotation. The em-dash sets off a sharp aside or pause—it interrupts the flow harder than commas do. The apostrophe shows possession or contraction. The famous error: its is possessive (no apostrophe), it's means it is.
Even fluent speakers make grammar mistakes that show up on standardized tests and in professional writing. Subject-verb agreement trips up everyone. The verb must agree with the subject in number. The hard cases come when a long phrase separates subject and verb: The list of items is on the table—the subject is list, not items. Indefinite pronouns like everyone, somebody, and nobody take singular verbs.
Pronoun-antecedent agreement matches a pronoun to its antecedent in number. Every student should bring his or her book is grammatically correct but formal. Modern style guides (AP, APA, Chicago) all allow singular they when gender is unknown or irrelevant.
Run-on sentences jam two independent clauses together without proper punctuation. Sentence fragments are the opposite: incomplete sentences punctuated as complete. Because it rained. is a fragment. Fix by attaching it to a main clause. Dangling modifiers describe a word that is not in the sentence. Walking down the street, the trees were beautiful—the trees were not walking. Fix by matching the modifier to the subject.
Who versus whom follows the he/him test. Less versus fewer follows countability: fewer apples (countable), less water (uncountable). The supermarket sign 10 items or less should read 10 items or fewer. Your versus you're: your is possessive, you're means you are. Same pattern hits their, they're, and there.
Parts of speech and basic noun/verb patterns. Drill irregular verb forms daily.
Present and past tenses in all four aspects. Practice with short writing prompts.
Future tenses, modals (can, could, should, must), and basic conditionals (zero, first).
Second and third conditionals, passive voice, and reported speech.
Punctuation deep dive: commas, semicolons, colons, em-dashes, apostrophes.
Common errors review and full practice test. Repeat weak areas before the next study cycle.
The English grammar publishing world has settled on a few authoritative resources almost every teacher recommends. Knowing which to buy and which to skip saves money and time.
Cambridge Grammar in Use by Raymond Murphy is the most widely used self-study grammar book in the world. The blue edition (intermediate) and red edition (elementary) cover the core grammar in two-page units: explanation on the left, exercises on the right. Cambridge University Press also publishes Advanced Grammar in Use for upper-level learners preparing for IELTS or TOEFL.
Practical English Usage by Michael Swan is the reference book English teachers reach for when they cannot answer a student's question. Arranged alphabetically by topic, it explains the rules behind common confusions: when to use the present perfect, why some verbs take gerunds and others infinitives, when articles are required.
Free online resources match the paid books on quality. British Council LearnEnglish offers structured lessons and audio for every grammar topic, organized by CEFR level (A1 through C1). BBC Learning English publishes short 5-minute video lessons. EnglishClass101 uses audio and video with PDF transcripts. EnglishGrammar.org is a free reference site with thousands of short articles and worksheets.
For practice tests, PTG offers free English grammar quizzes that mirror the format of standardized exams. Our English grammar test covers parts of speech, tenses, and punctuation in MCQ form. Combine one structured textbook (Murphy or Swan), one daily free resource (British Council), and weekly practice tests, and you cover every angle of English grammar learning.