Are you good at English?为什么用are?请把原因说明清楚!

what are you good at Are you good at English? What are you good at Are you good at ____ Are you good at english? Are you good at Chinese Are you good at swimming? you,at,are,good,swimming You are good at ( ) (look) after people. Are you good at English 是什么意思 Wow,you are good at English Are you good at sport?怎么回答? Are you good at your classmates?改错 Are you good at English?英语答 Are you 什么 good at the piano? Are you good at （swim） You are good at Electronic keyboard是什么意思 You are good at what you love; you love what you are good