ADJ at n
The 'good' group
These adjectives indicate that someone does something well or badly. We include here slow, which indicates that someone does something reluctantly or with difficulty, and new, which indicates that someone has little experience of doing something.
'And looking back I think I partly became very bad at maths 'cos I needed to be bad at something.'
Her mother was clever at many things; her movements were neat and deft and quick.
John is new at this. He's been on the job for only about a month now.
Ed began telling me I had not earned my salary for that month, and I wasn't worthy of it as I was rubbish at my job.
'He's useless at sport, I mean absolutely no ability with a ball - cannot hit a ball with a bat or kick it - utterly useless.'
The preposition at is sometimes followed by an '-ing' clause.
ace adept bad brilliant clever competent dreadful effective efficient excellent expert good great hopeless incompetent inept lousy marvellous new okay poor practised proficient rotten rubbish skilful skilled slow successful superb terrible terrific unsuccessful useless
She was good at raising money and did a very good job with the finances.
People are poor at recognising whether a flash of light occurs in their left or their right eye.
You are not slow at giving your opinions, but do not expect to meet with total approval.