1
Use one idiom, then explain it
An idiom should support your idea, not replace it. After the idiom, add a simple explanation.
CELPIP vocabulary guide
English Idioms for CELPIP Speaking and Writing
Idioms can make your answer sound more natural, but only when they are clear, common, and used in the right tone. This guide gives you clear idioms with CELPIP-style examples and shows you when to use them.
2
Choose common idioms only
CELPIP rewards clarity. A simple, natural idiom is better than a rare expression that feels forced.
3
Avoid idioms when the tone is formal
In Writing Task 1, a complaint or request email should sound professional. Use idioms only if they fit naturally.
What an idiom is
An idiom is a phrase whose meaning is not always clear from the individual words. For example, hit the nail on the head does not mean touching a real nail. It means saying exactly the right thing.
Useful idioms
Natural CELPIP examples
1
act your age
behave in a mature way
Best for: Advice, family situations, workplace behaviour
Speaking: I would suggest acting more maturely and discussing the problem calmly instead of arguing.
Writing: Students should be encouraged to act maturely and take responsibility for shared spaces.
2
strike a bargain
make an agreement that works for both sides
Best for: Negotiation, prices, community decisions
Speaking: They could strike a bargain by sharing the cost and choosing a cheaper option.
Writing: The city could strike a bargain with local businesses to keep the program affordable.
3
take after someone
be similar to a parent or family member
Best for: Personal experience, family descriptions
Speaking: She takes after her mother because they are both practical and patient.
Writing: This idiom is usually more conversational, so I would avoid it in a formal complaint email.
4
to be taken in
to be cheated or fooled
Best for: Online safety, shopping, scams
Speaking: I would advise my friend not to be taken in by fake online discounts.
Writing: Residents should not be taken in by misleading advertisements that promise unrealistic savings.
5
set a date
choose a specific day or time for something
Best for: Plans, appointments, scheduling
Speaking: You should set a date with your tutor and review vocabulary once a week.
Writing: I would like to set a date to inspect the apartment and discuss the repair timeline.
6
all at sea
confused and unsure what to do
Best for: Learning problems, first day at work, new systems
Speaking: My friend feels all at sea when he sees too many new English words at once.
Writing: New residents may feel all at sea if the instructions are not clear.
7
hit the nail on the head
say exactly the right thing
Best for: Opinions, feedback, problem solving
Speaking: You hit the nail on the head: the real problem is not time, but consistency.
Writing: The report hits the nail on the head by focusing on safety rather than appearance.
8
with flying colours
very successfully
Best for: Exams, interviews, training
Speaking: If you practice every day, you can pass the interview with flying colours.
Writing: With regular support, many students can complete the training with flying colours.
9
to be at loose ends
not sure what to do with your time
Best for: Free time, retirement, moving to a new city
Speaking: If he is at loose ends after work, he could join a local English conversation group.
Writing: This is a casual idiom, so it fits better in speaking than in a formal email.
10
face the music
accept the consequences of a mistake
Best for: Advice, responsibility, workplace problems
Speaking: He should face the music, apologize, and explain how he will fix the mistake.
Writing: The company should face the music and explain why the service was delayed.
11
learn the ropes
learn how something works
Best for: New job, school, immigration, workplace training
Speaking: At a new job, I would ask a coworker to help me learn the ropes during the first week.
Writing: A short orientation would help new volunteers learn the ropes more quickly.
12
a win-win situation
a result that benefits both sides
Best for: Survey responses, community plans, workplace suggestions
Speaking: Sharing the equipment would be a win-win situation because both teams save money.
Writing: Option B creates a win-win situation for residents and local businesses.
Common mistake
Students sometimes memorize idioms and force them into every answer. That can make the response sound unnatural. In CELPIP, idioms should help your message, not distract from it.
Do
Use idioms in Speaking when they sound natural and easy to understand.
Do
Use a few safe idioms in a Survey Response when they make your opinion clearer.
Do not
Memorize rare idioms and force them into every answer.
Do not
Use idioms if you are not sure about their meaning or grammar.
Mini CELPIP template
If you want to use an idiom safely, use this pattern:
Point: I think Option B is more practical.
Idiom: It creates a win-win situation.
Explanation: Students get healthier meals, and the school can reduce waste by offering food people actually want to eat.
Next step
Pick three idioms from this page. Use one in a Speaking answer and one in a Survey Response. Then decide which one you would leave out. That builds good judgment, not just memory.