ARE YOU SURE_ ING?

ARE YOU SURE_ ING? WHAT ARE YOU DO ING What are you doing为什么要加ing what are you doing do为什么加ing they are waiting for you为什么加ing 为什么how are you feeling?要加ing How are you feeling feel为什么加ing Are you interested in surfing?为什么surf要加ing? how much are you willing to pay 为什么用ing are you 后面的单词要不要加ing? thay are looking out after you ,另外are +ing 这个什么时态类似的有哪些? Are you crazy?和Are you joking?Are you crazy?Are you joking?为什么第一个要用原型而第二个用ing形式呢? How can you hear if you are not listening.为什么listening要加ing What are you talking about?为什么talk加ing这里talking是动词加ing形式还是名词形式`` how are you?still in U.S.hows everything there?Still breathe.Ing.Sup那个回答 Ing.Sup are you playing soccer this weekend为什么play要加ing I know you are arriving next sunday.为什麽arrive是ing形式谢 are you still （coming）to my birthday party in july?为什么come＋ing?