不该
How to Understand
不该 is an adverbial phrase meaning 'should not' or 'ought not to.' It expresses a sense of obligation or expectation that something should not happen, often implying disapproval or surprise at an action that violates social norms or expectations.
The character 不 (bù) means 'not,' and 该 (gāi) means 'should' or 'ought to.' Together, they form a negative expression of obligation, indicating what is not appropriate or expected in a given situation.
不该 is commonly used in daily conversations to express disappointment, caution, or moral judgment. It appears frequently in both spoken and written Chinese, especially in situations where someone has done something inappropriate or unexpected. It can also be used in more formal contexts, such as in literature or legal documents, to indicate what is not permissible or advisable.