This pattern is used to say that something is the right or proper thing to happen or be done, often because it is a natural consequence or a deserved outcome. It carries a strong sense of moral or logical appropriateness. You might hear it in formal speeches, essays, or news, but rarely in casual conversation. It sounds quite stiff and judgmental, so it's best used when you want to make a strong, principled statement. The nuance is close to 'should' but with more weight, as if the speaker is asserting that any reasonable person would agree. For example, if someone has worked hard, you could say their success はしかるべきだ (is deserved). The verb before it is always in the て-form, so it feels like a set phrase: てしかるべきだ. Often it's used with passive verbs to say something 'should be' done, like 'should be praised' or 'should be treated with respect.'