A contraction, as defined by the Oxford Learner's Dictionaries, is a shortened form of two words joined together with an apostrophe that marks the missing letters: I’m going to the store. (I am), They aren’t ready yet. (are not), It’s raining. (it is). Contractions are a natural part of spoken English and informal written English; they make speech sound fluent and natural. A very common learner error is confusing a contraction with a similar-sounding possessive, for example writing Its raining instead of It’s raining, or Your welcome instead of You’re welcome. Understanding their form and when to use them — and when not to — is essential at every level of English learning.
Common Positive Contractions
| Full form | Contraction | Example |
|---|---|---|
| I am | I’m | I’m tired. |
| you are | you’re | You’re right. |
| he/she/it is | he’s / she’s / it’s | She’s here. |
| we/they are | we’re / they’re | They’re late. |
| I will | I’ll | I’ll call you. |
| I have | I’ve | I’ve finished. |
| I had / would | I’d | I’d love to come. |
Common Negative Contractions
| Full form | Contraction | Full form | Contraction |
|---|---|---|---|
| do not | don’t | does not | doesn’t |
| did not | didn’t | is not | isn’t |
| are not | aren’t | was not | wasn’t |
| will not | won’t | would not | wouldn’t |
| can not / cannot | can’t | could not | couldn’t |
| have not | haven’t | has not | hasn’t |
When to Use Contractions
- Informal writing: emails to friends, text messages, social media.
- Spoken English: contractions are the natural norm in conversation.
- Dialogue: characters in fiction speak with contractions for realism.
When NOT to Use Contractions
- Formal academic writing: essays, reports, theses. Write the full form.
- Legal and official documents: always use full forms.
- For emphasis: “I will NOT accept this.” (full form adds stress)
Common Mistakes
- Wrong: Its raining. Correct: It’s raining. (its is a possessive; it’s = it is)
- Wrong: Your welcome. Correct: You’re welcome. (your is a possessive; you’re = you are)
- Wrong: Their coming. Correct: They’re coming. (their is a possessive; they’re = they are)
Practice Exercises
Grammar Quiz
Choose the correct contraction or full form in each sentence.
Cloze Dropdown
Fill in missing contractions in informal dialogues.
Complete the Sentence
Expand contractions or contract full forms as required.
Match-Up
Match each contraction to its full form.
Flash Cards
Drill contractions with their full forms for instant recall.
Practice What You’ve Learned
LexFizz has 30 free interactive exercises — no sign-up needed.
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Frequently Asked Questions
What is a contraction in English?
A contraction is a shortened form of two words joined by an apostrophe, where the apostrophe replaces the missing letters. Examples: I am → I'm, do not → don't, will not → won't. Contractions are common in spoken English and informal writing.
What is the difference between 'it's' and 'its'?
'It's' is a contraction of 'it is' or 'it has': It's raining. It's been a long day. 'Its' (no apostrophe) is a possessive pronoun: The cat licked its paw. This is one of the most common written errors in English. A simple test: if you can replace it with 'it is' or 'it has', use the apostrophe form.
Why is 'won't' the contraction of 'will not'?
'Won't' looks irregular because it comes from the older form 'woll not' (an early form of 'will'). Over centuries, the vowel changed to 'o' while the contracted form was preserved. It is simply an irregular historical form. Compare: can't (cannot), shan't (shall not) — English has several irregular negative contractions.
Should I use contractions in formal writing?
Generally, no. In academic essays, formal reports, business letters, and official documents, use full forms (do not, I will, it is). Contractions give a conversational tone that is inappropriate in formal contexts. However, some modern business emails and blog writing do use contractions for a friendly, accessible register.
What is the difference between 'you're' and 'your'?
'You're' = you are (contraction): You're welcome. You're doing well. 'Your' is a possessive adjective: Your bag is here. Your idea is brilliant. Test: replace with 'you are' — if it makes sense, use you're. This confusion is one of the most frequent errors in written English at all levels.
What is the difference between 'they're', 'their', and 'there'?
'They're' = they are (contraction): They're late. 'Their' = possessive pronoun: Their house is big. 'There' = place or existential marker: She's over there. There is a problem. All three are homophones (same pronunciation) but have completely different meanings and spellings. Careful proofreading prevents mix-ups in writing.
Can contractions appear in formal speech?
Yes. Even in formal spoken contexts (lectures, presentations, speeches), contractions are natural and acceptable in most English-speaking cultures. Avoiding all contractions in speech sounds stilted and unnatural. The no-contractions rule applies primarily to formal written text, not to professional spoken English.
What does the apostrophe replace in a contraction?
The apostrophe marks the exact position of the missing letter(s): do not → don't (missing 'o'), I am → I'm (missing 'a'), they are → they're (missing 'a'). One exception: will not → won't (the vowel changes as well as letters being omitted, due to historical reasons).
Are contractions used in British and American English the same way?
Yes, contractions are essentially the same in British and American English. The main contraction that differs slightly in usage is 'shan't' (shall not), which is common in British English but very rare in American English, where 'won't' or 'can't' are preferred. Otherwise the contraction systems are identical.
Can I use contractions in IELTS or Cambridge exam writing?
In IELTS Academic and General Writing, and Cambridge C1/C2 essays, avoid contractions as they are features of informal register. However, in Cambridge B2 informal writing tasks (informal letters, emails), contractions are expected and appropriate. Always match your register to the task type specified in the exam question.