Shouldn't

The contraction of "should not," indicating an obligation, duty, or advisability that is not fulfilled or something that is unwise or undesirable. It implies a recommendation, expectation, or logical consequence that is negated. Often used to express disapproval, regret, warning, or a suggestion against a particular action or state. It signifies an omission of expected behavior, potential negative outcome or a better course of action to be taken.

Shouldn't meaning with examples

• Knowing it was going to rain, she shouldn't have left her umbrella at home. She now feels a sense of regret for her oversight. Also, you shouldn't play with fire, as it's dangerous. He shouldn't have broken her heart. A wise individual, shouldn't drink and drive because of potential consequences.
• The company shouldn't have cut employee benefits; it damaged morale and productivity. Also, you shouldn't believe everything you read on the internet. She shouldn't waste her time on unproductive activities. The project, considering the deadline, shouldn't be delayed, to ensure its completion on schedule.
• They shouldn't have revealed the secret so early. He shouldn't have acted impulsively, but paused and considered his options. We shouldn't disregard our health and shouldn't ignore signs of illness. Similarly, we shouldn't take more medicine than is prescribed by a doctor.
• You shouldn't eat so many sweets if you are trying to lose weight. A student shouldn't cheat on exams because it compromises integrity. The child shouldn't run around the pool. He shouldn't make that hasty decision, as it is crucial to deliberate before taking steps that are crucial.