what are you doing there?oh,going to the beach…maybe playing volleyball.为什么用going和playing
问题描述：
what are you doing there?oh,going to the beach…maybe playing volleyball.为什么用going和playing
答
问题是你在那儿干什么是现在问的 所以回答要用一致的语态来回答 就是要加ing 完成的回答是Oh,I'm going to the beach.