skating is my favorite sport.中skating为什么要+ing

skating is my favorite sport.中skating为什么要+ing My favorite sport is skating.skate为什么要加ing? My favorite sport is skating.(同意句转换） My favorite sport is skating .I skate __ My favourite sport is skating.的意思 My favorite sport is （skating）对有括号的单词提出部分提问 ---- ---- your f running is her favorite sport 为什么用running,skating is her fav （）is Tom’favorite sport.skate or skating?why? My favorite sport is playing basketball.为什么加ing? swiming is my favorite sport.中swim为什么要用ing形式.还有把所有初一类似这种形式告诉 My favorite sport is playing basketball 中的play后面为什么要加ing形式 My favorite sport is playing……中的play后面为什么要加ing形式