They are good at swim.They are good at swimming.这两个表达方式都对吗?请

They are good at swim.They are good at swimming.这两个表达方式都对吗?请 Are they good at ( 用swim的正确形式填空 and they are very good at swimming in the Are they good at ()?-yes,they are.A.swim B.to swim C.swimmin They are swimming at the beach这句话对吗 Are yo good at()?A.swim B.swimming C.swims Are you good at swimming? you,at,are,good,swimming 请按THEY LIVE IN---- .THEY EAT--- .THEY ARE GOOD AT--- .THEY - what are they good at?怎么回答 my parents are very good at ( )《swim》 Are you good at （swim）