arts
She isn't very good at arts.
cook
They are bad at cooking. / They are terrible at cooking.
arts
They are very good at arts.
basketball
He is terrible at basketball.
maths
He isn't very good at maths.
take photos
He is good at taking photos.
run
They are good at running./They are quite good at running.
maths
He is very good at maths.
cook
He is very good at cooking. He is good at cooking.
run
He isn't very good at running. He is bad at running.
swim
He is bad at swimming.
swim
She is good at swimming./She is quite good at swimming
windsurfing
She isn't very good at windsurfing
basketball
He is good at basketball.
windsurf
She is good at windsurfing.