The rule in one minute
Register means how formal your writing is. Formal and informal English are not right and wrong versions. They are different settings, and each is correct in the right place.
Use formal English for a letter of complaint, a report or persuasive writing for the public. Use informal English for a message to a friend or a light diary entry.
| Feature | Formal | Informal |
|---|---|---|
| Contractions | do not, cannot | don’t, can’t |
| Slang and abbreviations | Avoid | Allowed |
| Word choice | request, however | ask for, but |
| Tone | Measured | Warm and direct |
Neither column is better. Marks come from matching the task.
Why it matters in the exam
Directed writing is marked partly on matching the form, audience and purpose. Register is a marked skill.
A formal complaint written in chatty English shows that the writer has not thought about the reader. A friendly note in stiff, formal English sounds odd in the other direction.
A steady register also makes your writing feel planned. If it changes halfway through, it looks like you forgot who you were writing to.
Before and after
- Task needs formal, but too informal: Hi, I’m writing ‘cos your bus service is rubbish and it’s driving everyone crazy. Better: I am writing to express my concern about the recent decline in the reliability of your bus service.
- Task needs informal, but too formal: I am pleased to inform you that I shall attend your gathering. Better (message to a friend): Thanks, I’d love to come to your party!
- Slang in a formal piece: The plan was a total disaster and the council totally messed up. Better: The plan failed, and the council must accept responsibility.
- Register changes midway: The situation is unacceptable and, honestly, it’s a bit of a nightmare. Keep it formal: The situation is unacceptable and cannot be allowed to continue.
This is easier to improve with a teacher beside you. A paid one-hour trial starts from your child's own recent work.
Try it yourself
Rewrite each sentence in the register the task needs, then check below.
- (Formal letter) You guys really need to sort this out ASAP.
- (Formal report) The food at the event was pretty bad, tbh.
- (Message to a friend) I hereby confirm my attendance at your birthday celebration.
- (Formal complaint) It’s not fair and I’m super annoyed about it.
Answers (many versions are possible): (1) I would be grateful if this matter could be resolved as soon as possible. (2) The catering at the event fell well below an acceptable standard. (3) Can’t wait for your birthday, I’ll definitely be there! (4) This situation is unfair, and I am extremely dissatisfied with the way it has been handled.
Make it a habit
Before you write, name the form, the audience and the purpose. Then decide the register and write formal or informal at the top of your plan. This stops the most common error, which is starting formal and sliding into casual comments.
To make writing formal: expand contractions, remove slang and abbreviations, and choose more exact words. To make it informal: allow contractions and a warmer, more direct tone.
When you edit a formal piece, look for contractions and casual words that crept in. For an informal piece, check that it still sounds like a real person talking to a friend.
Where students get stuck, and how we help
Students usually know both styles. They slip when a task does not say clearly which one to use, or when the voice changes halfway through. In our writing paper lessons, a teacher sets tasks with real audiences and marks how well your register matches in your own writing.
Lessons start from RM70/hr. You can book a paid one-hour trial to try it.
Next step
Practise switching in the practice area, and read our guide on how to match register to audience. For more grammar, try paragraphing and parallel structure.