Formal and Informal Language

Understanding register is essential for exam writing tasks · Upper Intermediate B2

Task A — Classification
Formal or informal?
Each pair below shows two ways of expressing the same idea. Decide whether each one (A and B) is more typical of formal or informal writing.
1 · verb forms
A full forms: does not ✓ formal
B contracted forms: doesn't ✓ informal
2 · verb types
A phrasal verbs: put off
B single-word verbs: postpone
3 · punctuation
A exclamation marks: I couldn't believe it!
B no exclamation marks: I could not believe it.
4 · vocabulary range
A common words: enough
B less common words: sufficient
5 · word length
A long words: frequently
B short words: often
6 · verb voice
A active verb forms: I took
B passive verb forms: I was taken
7 · abbreviation
A full forms: approximately
B abbreviations: approx.
8 · expression type
A textbook expressions: a limited quantity
B conversational expressions: a bit
9 · tone
A friendly, personal tone: Please try to …
B distant, impersonal tone: It would be advisable to …
10 · sentence completeness
A complete sentences: There was no sound.
B incomplete sentences: Not a sound.
Task B — Sorting
Formal or informal? Drag each word or phrase into the correct column.
These words and phrases all relate to similar ideas. Which register does each one belong to?
💡
Language tip: Many formal English words come from Latin or French. If you're Italian, you'll often recognise them! Words like sufficient, approximately, terminate, commence sound like Italian words — that's a clue they're formal. Short, Anglo-Saxon words (enough, about, end, start) tend to be informal.
sufficient
a bit
commence
kick off
I was informed
I was told
It would be advisable
You should
I regret to inform you
Sorry to say
approximately
about
terminate
end
📋 Formal
💬 Informal