Punctuation marks are the signals of written English. The same words can mean different things with different punctuation:
Punctuation marks at a glance
| Mark | Name | Main job |
|---|---|---|
| . | Full stop (UK) / period (US) | Ends a statement |
| , | Comma | Separates parts of a sentence; short pause |
| ' | Apostrophe | Possession or missing letters |
| ; | Semicolon | Joins two closely related complete sentences |
| : | Colon | Introduces a list, explanation or example |
| ? / ! | Question / exclamation mark | Ends a direct question / shows strong feeling |
| " " or ' ' | Quotation marks (inverted commas) | Show exact words spoken or written |
| - / — | Hyphen / dash | Joins words / marks a break or extra information |
| ( ) | Brackets (parentheses) | Add extra, non-essential information |
Full stop (.)
- Ends a statement or command: The meeting starts at ten. Please be on time.
- Used in some abbreviations: e.g., i.e., etc. British English often omits it in titles (Mr, Dr); American English uses it (Mr., Dr.).
- One full stop only — if a sentence ends with an abbreviation, don't add a second: …pens, paper, etc.
Comma (,): 7 rules that cover most cases
- Lists: I bought rice, lentils and spices. A comma before "and" (the Oxford or serial comma) is optional — rice, lentils, and spices — but be consistent.
- Before a joining word (and, but, so, or) linking two full sentences: It was raining, so we stayed inside.
- After an introductory word or clause: However, the plan failed. / When the bell rang, everyone left.
- Around extra (non-essential) information: My brother, who lives in Delhi, is a doctor.
- When addressing someone directly: Thank you, Priya. / Ravi, can you help?
- Before or after a quotation: She said, "I'm ready."
- In dates, addresses and numbers: Monday, 5 October · Pune, Maharashtra · 10,000 (Indian style also uses 1,00,000 for one lakh).
Don't put a comma between a subject and its verb: ✗ The students in my class, are friendly.
Apostrophe (')
1. Possession
| Noun | Rule | Example |
|---|---|---|
| Singular | add 's | the teacher's desk, James's book (or James' book) |
| Plural ending in -s | add ' only | the teachers' room (many teachers) |
| Irregular plural | add 's | the children's toys, women's rights |
2. Contractions (missing letters)
it's (it is), don't (do not), they're (they are), I've (I have), won't (will not). Avoid contractions in formal writing.
Semicolon (;)
- Joins two complete sentences that are closely related: I have an exam tomorrow; I can't go out tonight.
- Before linking adverbs like however, therefore, otherwise: The plan was good; however, it was too expensive.
- Separates items in a list when the items already contain commas: We visited Jaipur, Rajasthan; Kochi, Kerala; and Shillong, Meghalaya.
Colon (:)
- Introduces a list after a complete sentence: You need three things: a passport, a visa and a ticket. (✗ You need: a passport… in formal writing)
- Introduces an explanation or result: There was one problem: nobody had the key.
- Before a formal quotation, in times and ratios: 10:30 a.m., a ratio of 3:1.
Question marks and exclamation marks
- Use ? only for direct questions: Where are you going? Not for reported ones: He asked where I was going. (See reported speech.)
- Use ! for strong emotion or emphasis: What a beautiful view! Use one, not three, and avoid it in formal writing.
Quotation marks (" " or ' ')
- Show someone's exact words: "I'll be late," she said.
- American English prefers double quotes; British English often uses single. Choose one style and keep it.
- Start a new paragraph each time a new person speaks in a story.
- Commas and full stops usually go inside the closing quotation mark in dialogue: "Come in," he said.
- Titles of short works (articles, songs, poems) can go in quotation marks; long works (books, films) are usually in italics.
Hyphen (-) and dash (—)
- Hyphen joins words into one idea, especially before a noun: a well-known writer, a five-year plan, a part-time job, twenty-one. But: The writer is well known (after the noun, often no hyphen).
- Dash (longer) marks a strong break or adds information: The answer was simple — work harder. Use dashes sparingly in formal writing; commas or brackets are safer.
- En dash (–) shows ranges: pages 10–15, 2020–2025.
Capital letters
Use a capital letter for: the first word of a sentence · the pronoun I · names of people, places, organisations (Priya, Chennai, the United Nations) · days, months and festivals (Monday, April, Diwali) · languages and nationalities (English, Indian) · the main words of titles (The Old Man and the Sea). Seasons are normally lower case: summer, winter.
Correct the punctuation.
- its a beautiful day lets go to the park
- My sisters friend who lives in mumbai is visiting us.
- I wanted to come, I was busy.
- She asked "where is the station."
- You will need the following, a pen paper and a calculator.
Show answers
- It's a beautiful day. Let's go to the park!
- My sister's friend, who lives in Mumbai, is visiting us.
- I wanted to come, but I was busy. / I wanted to come; however, I was busy.
- She asked, "Where is the station?"
- You will need the following: a pen, paper and a calculator.
Good punctuation makes every piece of writing clearer — practise it in your next paragraph, letter or essay.
Frequently asked questions
What are the main punctuation marks in English?
The main marks are the full stop, comma, apostrophe, semicolon, colon, question mark, exclamation mark, quotation marks, hyphen, dash and brackets.
What is a comma splice?
A comma splice is the mistake of joining two complete sentences with only a comma, as in “I love reading, it relaxes me.” Use a full stop, a semicolon or a joining word instead.
When do I use a semicolon?
Use a semicolon to join two closely related complete sentences, before linking words like however or therefore, and to separate list items that already contain commas.
What is the difference between its and it’s?
“It’s” means “it is” or “it has”. “Its” shows possession, like “his” or “her”: “The dog wagged its tail.”
Should I use single or double quotation marks?
Both are correct. American English usually uses double quotation marks, British English often uses single. Choose one style and use it consistently.
What is the Oxford comma?
It is the optional comma before “and” in a list of three or more items: “red, white, and blue.” Some style guides require it and others don’t; be consistent.