中高考点常考be good at用法at 为介词后面+动名词

She is good at Maths. is good （adj）at 擅长于 do well（adv） in She is good at playing basketball. She does well in playing basketball. Is bad at, do badly in Be good to sb 对某人友好 Our teachers are good to us in our school. Be good for 对--有好处 Eating more vegetables is good for our health.