Sentence examples for should've been from inspiring English sources

"should've been" is correct and usable in written English.
It is a contraction of "should have been" and is used to indicate that something was expected or supposed to happen in the past, but did not. Example: I should've been more careful with my money this month. I overspent and now I can't afford to go on vacation. In this sentence, "should've been" is used to express regret or disappointment about not being careful with money in the past. Other examples of when to use "should've been" include: - I should've been studying for my exam instead of watching TV all day. - The project should've been completed by now, but there have been some delays. - They should've been here an hour ago. I wonder what's taking them so long.