Sentences with Clam Up

As the teacher posed a challenging math problem, some students would clam up, afraid of making a mistake.

The shy student would often clam up in social situations, finding it hard to express themselves.

The shy student tends to clam up whenever the teacher asks him to speak in front of the class.

Timmy tends to clam up when discussing his feelings with others, preferring to keep his emotions to himself.

At the family gathering, Uncle Bob would often clam up when the conversation turned to sensitive topics, such as politics or religion.