Information Sheet 1.4-2

A perfect accent is not everything. Sure, a good pronunciation can make you sound more like a native, but it won’t make you fluent. This is why it’s best to work on expanding your vocabulary with practical notions such as English idioms, sayings, or expressions. These will add substance and even humor to your discourse while making you sound more natural and authentic.

Here are some of the most common and fun idioms you can use:

Break a leg: Good luck
Hit the sack: Go to sleep
On the ball: Doing a good job
Under the weather: Sick
A perfect storm: The worst possible situation
Break the ice: Make people feel more comfortable
Costs an arm and a leg: Very expensive
It’s raining cats and dogs: It’s raining hard

English idioms for certain situations

Wondering what are the most common English phrases for daily situations? Let’s explore them all!

To ask how someone is doing: What’s up?, How’s it going?, What’s new?
To say how you are doing: Could be better, Pretty good, Same as always
To thank somebody: I really appreciate it, I’m really grateful
To accept someone’s thank: No problem, Don’t mention it, Anytime
To end a conversation: It was good catching up, I have to return to my work
To say you don’t have any idea: I can’t help you there, Beats me
To agree with somebody: Exactly, Absolutely, That’s for sure, I suppose so
To disagree with somebody: I’m not sure about that, That’s not how I see it
To respond to good news: How wonderful, Awesome, I’m so glad to hear
To respond to bad news: How terrible/awful, Oh no, Terrible, If you need anything, I am here
To invite someone: Are you free…, Do you wanna…, How about…
To apologize: I apologize for, I’m sorry, It’s my fault
For food: I’m starving,
For price: That’s a good deal, It was dirt cheap (very inexpensive), That’s a rip-off (overpriced)
For weather: Freezing (very cold), chilly (unpleasantly cold), boiling (very hot)

Reference:
https://www.mondly.com/english-phrases-expressions