Are you interested in surfing?为什么surf要加ing?

Are you interested in surfing?为什么surf要加ing? are you interested in surfing the internet 怎么翻译 Are you interested in surfing the Internet?3Q -Are you interested in surfing the Internet?-well,_____. are you interested in Who are interested in taking part in it.为何加ed与ing? 为什么how are you feeling?要加ing What are you doing为什么要加ing are you interested in English? Are you interested in basketball what are you interested in Is he interested in surfing the Internet