Whether you are a beginner just starting to learn English or an advanced learner who wants to clear up confusing rules, this Complete English Grammar Guide covers everything you need. From the basic parts of speech to advanced topics like conditionals, inversion, and parallel structure — all explained clearly with rules, examples, and practice.
This is a master guide. Each section gives you the key rules and examples. Click the links inside each section to read the full, detailed article on that topic. You can also download the complete PDF for offline study.
📚 Table of Contents
- What Is English Grammar?
- Parts of Speech
- Sentence Structure
- Articles & Determiners
- English Tenses
- Subject–Verb Agreement
- Modal Verbs
- Active & Passive Voice
- Direct & Indirect Speech
- Conditionals
- Phrases & Clauses
- Question Formation
- Negation Rules
- Punctuation Rules
- Capitalization Rules
- Common Grammar Mistakes
- Commonly Confused Words
- Advanced Grammar Topics
- Grammar for Speaking vs Writing
- How to Improve Your Grammar
- Practice Exercises
- Frequently Asked Questions
1. What Is English Grammar?
Grammar is the set of rules that governs how words are arranged and used in a language. It tells us how to build sentences correctly so that other people can understand us clearly.
Why Grammar Matters
- It helps you communicate clearly in speaking and writing.
- It builds confidence — you stop second-guessing yourself.
- It is essential for exams (IELTS, TOEFL, SSC, UPSC, and more).
- It makes your English sound professional and educated.
Benefits of Learning Grammar
- Better reading comprehension
- More accurate writing
- Clearer spoken English
- Faster learning of new vocabulary
2. Parts of Speech
Every word in English belongs to a part of speech. There are 8 main parts of speech. Understanding them is the foundation of all grammar.
| Part of Speech | What It Does | Example |
|---|---|---|
| Noun | Names a person, place, thing, or idea | teacher, India, happiness |
| Pronoun | Replaces a noun | he, she, they, it |
| Verb | Shows action or state | run, think, is, have |
| Adjective | Describes a noun | beautiful, tall, red |
| Adverb | Describes a verb, adjective, or adverb | quickly, very, always |
| Preposition | Shows relationship between nouns | in, on, at, under |
| Conjunction | Joins words or clauses | and, but, because, although |
| Interjection | Expresses emotion | Wow! Oh! Ouch! |
🔷 Nouns
A noun is a word that names a person, place, animal, thing, or idea. Nouns can be proper (India, Rahul), common (city, boy), countable (books, chairs) or uncountable (water, advice).
- Countable: I have three books. | There are many students.
- Uncountable: Can you give me some advice? | She drinks a lot of water.
- Possessive: This is Rahul's bag. | The teacher's desk.
➡️ Read Full Article: Types of Nouns
🔷 Pronouns
A pronoun takes the place of a noun to avoid repetition.
- Personal: I, you, he, she, it, we, they
- Reflexive: myself, yourself, himself, herself, themselves
- Demonstrative: this, that, these, those
- Relative: who, which, that, whose
➡️ Read Full Article: Types of Pronouns
🔷 Verbs
A verb shows an action, event, or state of being.
- Action verbs: run, write, eat, think
- Stative verbs: know, believe, own, love (not usually used in continuous tenses)
- Helping verbs: is, are, was, have, do, will, can, must
➡️ Read Full Article: Types of Verbs
🔷 Adjectives
An adjective describes or modifies a noun. When you use multiple adjectives, follow this order:
Opinion → Size → Age → Shape → Colour → Origin → Material → Purpose + Noun
- A beautiful small old round green French silver cooking pot.
- She wore a lovely long red dress.
➡️ Read Full Article: Order of Adjectives
🔷 Adverbs
An adverb tells us more about a verb, adjective, or another adverb — how, when, where, or how much.
- She sings beautifully. (how)
- He arrived yesterday. (when)
- They looked everywhere. (where)
➡️ Read Full Article: Types and Position of Adverbs
🔷 Prepositions
- Time: at 5 PM, on Monday, in January
- Place: in the room, on the table, at the station
- Direction: to the market, towards the door, into the building
➡️ Read Full Article: Prepositions of Time, Place, and Direction
🔷 Conjunctions
- Coordinating (FANBOYS): for, and, nor, but, or, yet, so
- Subordinating: because, although, while, if, when, since, unless
- Correlative: either…or, neither…nor, both…and, not only…but also
➡️ Read Full Article: Types of Conjunctions
3. Sentence Structure
A sentence must have a subject and a predicate (verb). It expresses a complete thought.
Basic Word Order
English follows the S + V + O order:
- Subject: the person or thing doing the action
- Verb: the action
- Object: what the action is done to
- Priya reads books. (S + V + O)
- The teacher explained the lesson. (S + V + O)
Types of Sentences
| Type | Purpose | Example |
|---|---|---|
| Declarative | Makes a statement | She is a doctor. |
| Interrogative | Asks a question | Is she a doctor? |
| Imperative | Gives a command | Open the door. |
| Exclamatory | Expresses strong emotion | What a beautiful day! |
➡️ Read Full Article: Sentence Structure and Types
4. Articles and Determiners
Articles (a, an, the) are special adjectives that come before nouns. Getting them right is one of the biggest challenges for English learners.
- A — used before consonant sounds: a book, a university
- An — used before vowel sounds: an apple, an hour
- The — used for specific or known things: The sun, the teacher I told you about
Use a/an for something mentioned for the first time. Use the when the listener already knows what you are talking about.
- I saw a dog. The dog was black.
Determiners
- Demonstratives: this, that, these, those
- Quantifiers: some, any, many, much, few, little, a lot of
- Possessives: my, your, his, her, its, our, their
➡️ Read Full Article: Articles (A, An, The) — Complete Rules
5. English Tenses
English has 12 tenses. Each tense is formed differently and expresses a different relationship with time.
Present Tenses
| Tense | Structure | Example |
|---|---|---|
| Simple Present | S + V1 (+ s/es) | She reads every day. |
| Present Continuous | S + is/am/are + V-ing | She is reading now. |
| Present Perfect | S + has/have + V3 | She has read the book. |
| Present Perfect Continuous | S + has/have been + V-ing | She has been reading for two hours. |
Past Tenses
| Tense | Structure | Example |
|---|---|---|
| Simple Past | S + V2 | She read yesterday. |
| Past Continuous | S + was/were + V-ing | She was reading when I arrived. |
| Past Perfect | S + had + V3 | She had read before the test. |
| Past Perfect Continuous | S + had been + V-ing | She had been reading for an hour. |
Future Tenses
| Tense | Structure | Example |
|---|---|---|
| Simple Future | S + will + V1 | She will read tomorrow. |
| Future Continuous | S + will be + V-ing | She will be reading at 5 PM. |
| Future Perfect | S + will have + V3 | She will have read by then. |
| Future Perfect Continuous | S + will have been + V-ing | She will have been reading for 3 hours. |
➡️ Read Full Article: All 12 Tenses with Examples
6. Subject–Verb Agreement
The verb must always agree in number with the subject.
- ✅ She reads every day. (singular subject → singular verb)
- ✅ They read every day. (plural subject → plural verb)
- ❌ She read every day. (wrong — singular subject with plural verb)
Special Rules
- Collective nouns (team, committee) usually take a singular verb: The team is ready.
- "Either…or" and "neither…nor" — the verb agrees with the nearer subject.
- Subjects joined by "and" take a plural verb: Ram and Shyam are friends.
➡️ Read Full Article: Subject–Verb Agreement Rules
7. Modal Verbs
Modal verbs are helping verbs that express ability, permission, possibility, obligation, and advice. They are always followed by the base form of the verb.
| Modal | Main Use | Example |
|---|---|---|
| can | Ability / informal permission | I can drive. |
| could | Past ability / polite request | Could you help me? |
| may | Formal permission / possibility | May I come in? |
| might | Lower possibility / uncertainty | I might come. |
| must | Strong obligation / certainty | You must stop. |
| should | Advice / recommendation | You should rest. |
| would | Polite requests / past habits | Would you like tea? |
| ought to | Moral duty / advice | You ought to apologise. |
➡️ Read Full Article: Modal Verbs — Can, Could, May, Might, Should, Must
8. Active and Passive Voice
In active voice the subject does the action. In passive voice the subject receives the action.
| Voice | Structure | Example |
|---|---|---|
| Active | Subject + Verb + Object | The teacher corrected the paper. |
| Passive | Object + is/was + V3 + (by Subject) | The paper was corrected by the teacher. |
- Active: Ram broke the window.
- Passive: The window was broken by Ram.
➡️ Read Full Article: Active and Passive Voice
9. Direct and Indirect Speech
Direct speech gives the exact words spoken. Indirect (reported) speech reports what someone said without quoting exactly.
- Direct: He said, "I am tired."
- Indirect: He said that he was tired.
Key Changes in Indirect Speech
| Direct | Indirect |
|---|---|
| is / am / are | was / were |
| will | would |
| can | could |
| today | that day |
| now | then |
| here | there |
➡️ Read Full Article: Direct and Indirect Speech
10. Conditionals
Conditionals express "if" situations — what happens, what might happen, or what could have happened.
| Type | Use | Structure | Example |
|---|---|---|---|
| Zero | General truth / facts | If + present, present | If you heat water, it boils. |
| First | Real future possibility | If + present, will + V1 | If it rains, I will stay home. |
| Second | Unreal / imaginary present | If + past, would + V1 | If I had wings, I would fly. |
| Third | Unreal past / regret | If + past perfect, would have + V3 | If I had studied, I would have passed. |
➡️ Read Full Article: Conditionals — Zero, First, Second, Third, Mixed
11. Phrases and Clauses
- A phrase is a group of words without a subject and verb: in the morning, the tall boy
- A clause has a subject and verb: when she arrived, because he was tired
Types
- Noun phrase: The old brown dog slept.
- Verb phrase: She has been working all day.
- Adverb clause: Because it was raining, we stayed inside.
- Relative clause: The man who called you is outside.
➡️ Read Full Article: Phrases and Clauses
12. Question Formation
WH Questions
- Who is she? | What are you doing? | Where do you live?
- When did he arrive? | Why are you late? | How can I help?
Yes/No Questions
- Do you like coffee? — Yes, I do. / No, I don't.
- Is she coming? — Yes, she is. / No, she isn't.
Tag Questions
Positive sentence → negative tag. Negative sentence → positive tag.
- She is smart, isn't she?
- They don't know, do they?
➡️ Read Full Article: Question Formation in English
13. Negation Rules
- With be verbs: She is not ready.
- With auxiliary verbs: They have not arrived.
- With main verbs: He does not eat meat.
- ❌ I don't know nothing.
- ✅ I don't know anything.
- ✅ I know nothing.
14. Punctuation Rules
| Mark | Use | Example |
|---|---|---|
| . Period | End of sentence | She left early. |
| , Comma | List, pause, clause | I bought apples, mangoes, and grapes. |
| ; Semicolon | Join related sentences | He studied hard; he passed the exam. |
| : Colon | Introduce a list or explanation | Bring these items: pen, book, ruler. |
| ' Apostrophe | Possession or contraction | Rahul's bag | don't = do not |
| " " Quotes | Direct speech | She said, "Come in." |
➡️ Read Full Article: Punctuation Rules in English
15. Capitalization Rules
- First word of every sentence: The book is on the table.
- Proper nouns — names of people, places: India, Priya, Delhi
- Days and months: Monday, January (not seasons: summer, winter)
- Titles before names: Dr. Sharma, Mr. Gupta
- The pronoun "I" is always capitalised.
16. Common Grammar Mistakes
- ❌ Their going to the park. ✅ They're going to the park.
- ❌ I left my bag over their. ✅ I left my bag over there.
- ❌ Your very smart. ✅ You're very smart.
- ❌ The dog hurt it's paw. ✅ The dog hurt its paw.
- ❌ Rain has a bad affect on the roads. ✅ Rain has a bad effect on the roads.
- ❌ She is smarter then me. ✅ She is smarter than me.
➡️ Read Full Article: 30 Most Common Grammar Mistakes
17. Commonly Confused Words
| Word Pair | Difference | Example |
|---|---|---|
| Say vs Tell | Say does not need an object; tell always needs one | She said hello. / She told me to go. |
| Above vs Over | Above = higher position; over = covering or across | The plane flew above the clouds. / She put a blanket over him. |
| Borrow vs Lend | Borrow = take; lend = give temporarily | Can I borrow your pen? / Can you lend me your pen? |
| Bring vs Take | Bring = towards speaker; take = away from speaker | Bring me that book. / Take this letter to the office. |
➡️ Read Full Article: Commonly Confused Words in English
18. Advanced Grammar Topics
Gerunds and Infinitives
- Gerund (V-ing as noun): Swimming is good exercise.
- Infinitive (to + V1): She wants to learn English.
- Some verbs take only gerunds: enjoy, avoid, finish → I enjoy reading.
- Some verbs take only infinitives: want, decide, hope → She decided to leave.
Relative Clauses
- Defining: The man who called you is at the door. (essential information)
- Non-defining: My mother, who is a teacher, lives in Patna. (extra info, use commas)
Parallel Structure
When you list items or join clauses, keep them in the same grammatical form.
- ❌ She likes swimming, to run, and walks.
- ✅ She likes swimming, running, and walking.
Inversion
We invert (flip) the subject and auxiliary in formal writing or for emphasis.
- Hardly had he sat down when the phone rang.
- Never have I seen such a thing.
➡️ Read Full Article: Advanced Grammar — Gerunds, Inversion, Ellipsis
19. Grammar for Speaking vs Writing
| Feature | Formal (Writing) | Informal (Speaking) |
|---|---|---|
| Contractions | I do not know. | I don't know. |
| Sentence length | Longer, complex | Shorter, simpler |
| Vocabulary | Sophisticated words | Common words |
| Passive voice | More common | Rarely used |
| Questions | Indirect: Could you tell me…? | Direct: Where is it? |
20. How to Improve Your English Grammar
- 📖 Read every day — newspapers, novels, articles in English.
- ✍️ Write daily — a journal, short paragraphs, or essays.
- 🗣️ Speak aloud — practice grammar in real sentences, not just exercises.
- 📱 Use apps — Wordify English, Grammarly, Duolingo for daily practice.
- 🔁 Revise mistakes — keep a notebook of your common errors and review it weekly.
- 🎧 Listen actively — English podcasts, movies, and YouTube channels build intuition.
21. English Grammar Practice Exercises
A. Fill in the Blanks (Modal Verbs)
- You _______ wear a seatbelt. It is the law. (must / might)
- _______ I use your pen? (Can / Should)
- She _______ be at home — I'm not sure. (must / might)
- He _______ run very fast when he was young. (could / should)
B. Correct the Mistake
- She can to swim very well. → ___________
- He musts finish his work. → ___________
- Their going to the market. → ___________
- I don't know nothing about it. → ___________
C. Choose the Correct Word
- The (affect / effect) of pollution on health is serious.
- She is taller (then / than) her sister.
- Can you (borrow / lend) me your dictionary?
- The dog hurt (it's / its) leg.
A: 1. must 2. Can 3. might 4. could
B: 1. can swim 2. must finish 3. They're 4. don't know anything
C: 1. effect 2. than 3. lend 4. its
22. Frequently Asked Questions (FAQ)
What are the 12 tenses in English?
The 12 tenses are grouped into present, past, and future — each with simple, continuous, perfect, and perfect continuous forms. See Section 5 above for the full list.
What are the 8 parts of speech?
Noun, Pronoun, Verb, Adjective, Adverb, Preposition, Conjunction, and Interjection.
How can beginners learn English grammar?
Start with the basics: parts of speech → sentence structure → simple tenses → articles → common mistakes. Learn one topic at a time with clear examples, then practise using it in writing and speaking.
Which grammar topics should I learn first?
In this order: (1) Parts of speech, (2) Simple tenses, (3) Subject–verb agreement, (4) Articles, (5) Modal verbs, (6) Question formation, (7) Common mistakes.
How long does it take to improve grammar?
With daily practice of 20–30 minutes, most learners see a clear improvement in 3–6 months. The key is consistency — a little every day beats long sessions once a week.
Summary
- Grammar is the foundation of clear, confident English.
- There are 8 parts of speech and 12 tenses to master.
- Modal verbs are always followed by the base form of the verb.
- Avoid common mistakes: their/they're, your/you're, its/it's, affect/effect.
- Practice every day — reading, writing, and speaking are all equally important.
- Use each section of this guide as a starting point and follow the links to go deeper into every topic.