How many idioms should a native speaker know?
As many as possible!
Idioms help to express things in a more creative way!
Here are three of my favourites:
1. To beat around the bush
When someone is not specific about what they really mean or want to say
- I don’t like to beat around the bush. When I don’t like somebody, I tell them honestly!
2. Speak of the devil!
When you are talking about somebody and then they suddenly arrive.
- Speak of the devil! We were just talking about you, Tom! Nothing bad, I promise!
3. Piece of cake
When something is really easy to do.
- You want me to learn 3 idioms a day to improve my English? Piece of Cake!
Try to study idioms for fun, they are the most entertaining way of speaking a language! When you start to use these in natural speech, your English-speaking friends will be very impressed.