I had the sense that he was worried about something.
我感觉他有心事。
Doctors are worried about the possible spread of the disease.
医生担心这疾病可能会蔓延。
Back at home, her parents were worried.
在家中，她的`父母很担心。
There was a worried expression on her face.
她脸上流露出担心的神色。
They are worried about prospective changes in the law.
他们担心即将修改法律。