Goal
You’ll be able to correctly identify and switch between formal and informal English register, matching your language choice to genuinely different real-world situations.
Learn
Register refers to how formal or informal language is, and English genuinely shifts vocabulary, contractions, and structure depending on the actual situation:
Formal: I would like to inform you that the meeting has been postponed. Informal: Hey, just so you know, the meeting got pushed back. Formal: I am writing to request additional information. Informal: Can you send me more info?
Notice genuine, specific differences: formal register avoids contractions (I am, not I’m), uses more complete, structured sentences, and avoids casual vocabulary (postponed versus pushed back). Informal register embraces contractions, casual phrasing, and often shorter, more direct sentences.
A genuinely important real-world skill: correctly judging which register a situation actually calls for — a job application email genuinely needs formal register, while a text message to a close friend genuinely calls for informal register. Using the wrong register in either direction (overly casual in a formal context, or oddly stiff in a casual one) can create a real, noticeable mismatch that affects how your message is actually received.
Decision Task
You are writing a formal email to a potential employer. Before reading on: would Hey, just so you know, I’m interested in the job or I am writing to express my interest in this position be more appropriate?
Show Answer
I am writing to express my interest in this position. — a job application email genuinely calls for formal register; the casual version, with its contraction and informal phrasing, would create a noticeable, inappropriate mismatch with this specific professional context.
Common Mistake
Using informal register (contractions, casual phrasing) in a context that genuinely calls for formal language, such as a job application, or conversely, using stiff, overly formal language in a genuinely casual context like texting a close friend. Register mismatch, in either direction, creates a real, noticeable problem in how a message is actually received.
Practice Questions
1. Rewrite this formal sentence informally: I would like to inform you that the meeting has been postponed.
Show Answer
Any correct informal version, e.g. Hey, just so you know, the meeting got pushed back.
2. What is a genuine, specific feature that distinguishes formal from informal register?
Show Answer
Any of: avoiding contractions in formal register, using more casual vocabulary in informal register, more structured sentences in formal register.
3. What kind of real-world situation genuinely calls for formal register?
Show Answer
Any of: a job application, a formal email, a professional presentation.
4. What kind of real-world situation genuinely calls for informal register?
Show Answer
Any of: texting a close friend, casual conversation with familiar people.
5. Why does register mismatch create a real problem, beyond just sounding slightly odd?
Show Answer
It can affect how a message is actually received — overly casual language in a formal context can seem unprofessional; overly formal language in a casual context can seem oddly stiff or distant.
Try It Yourself
Without looking back, write the same basic message (“I can’t come to the meeting tomorrow”) in both formal and informal register, appropriate to two different real situations.
Show Answer
For example: Formal: I regret to inform you that I am unable to attend tomorrow’s meeting. Informal: Hey, I can’t make it to the meeting tomorrow.
Quick Check
1. What does “register” refer to?
Show Answer
How formal or informal language is.
2. Does formal register typically use contractions?
Show Answer
No, it typically avoids them.
3. Does informal register typically use contractions?
Show Answer
Yes.
4. Name a situation that genuinely calls for formal register.
Show Answer
Any of: a job application, a formal email, a professional presentation.
5. What can happen if you use the wrong register for a situation?
Show Answer
It can create a noticeable mismatch, affecting how your message is actually received.