She was concerned about her mother's health.
We are concerned about the rising cost of living.
He is concerned about the quality of the service.
I am concerned about making the same mistake again.
We are concerned about wasting time on small issues.
They are concerned about keeping the team motivated.
They are concerned about arriving late to the appointment.
I am concerned about how deeply the media can change public opinion.
I am extremely concerned about this incident and I want a quick resolution.
I am concerned that my child appears to be under a lot of stress at school.
My child has mentioned that some classmates have been making fun of him, and I am seriously concerned about this.