You should know

11th January 2024

You should know

We use this expression to say that we think someone logically should have the information needed in a specific situation.
Usage
Written: 
No
Spoken: 
Yes
Formal: 
No
Informal: 
Yes
Example 1
How do you say 'be quiet' in Spanish?
You should know - you lived in Spain for 6 months.
Example 2
What time did the party finish last night?
You should know - you were the last person to leave!