Definition / Explanation
Idioms are fixed expressions whose meaning is not always easy to understand from the individual words. Because they work as chunks, their word order, articles, and prepositions are often limited and cannot be changed freely. Even a small grammatical change can make the idiom sound wrong or destroy its idiomatic meaning. This is why learners should treat idioms as complete units, not as normal phrases that can be rebuilt word by word. At B2, the goal is not to use many idioms, but to understand how fixed they are.
Key Rules
- Learn idioms as whole expressions: in the same boat, under the weather.
- Do not change articles, prepositions, or word order unless the idiom naturally allows it.
- Some idioms can change tense, but the core wording usually stays fixed.
- Literal grammar logic is often not enough to predict the correct form.
- Use idioms carefully because register and tone matter.
Examples
- We are in the same boat.
- He kicked the bucket.
- I am feeling under the weather.
- They finally broke the ice.
- She hit the nail on the head.
Common Mistakes
- ❌ We are on the same boat. -> ✅ We are in the same boat.
- ❌ He kicked bucket. -> ✅ He kicked the bucket.
- ❌ She hit the nail on head. -> ✅ She hit the nail on the head.