为什么Playing computer games sounds relaxing中的sound要加s?

Playing computer games.中的playing为什么要加ing? computer playing与 playing computer的区别 stop playing computer Don't spend your free time playing computer games.句子中playing为什么不用原形play? the boy spends most of his time playing computer games为什么用playing the boy stayed up all night playing computer games.为什么用playing. playing computer和playing computer games之间加不加介词the? They are playing computer games.对playing computer games提问. I dislike playing computer games was playing computer games=? playing computer games可以放句首吗 It will be better than playing computer games all day.为什么playing要加ing.在这里than是不是介词 computer games is very_____.I'm_________in playing them. .【为什么】Computer games is very_____.I'm_________in playing them. A.interesting,interesting B.interested,interested C.interest she told me she was playing computer gameshe told me she was playing computer games为什么told后面不加to His mother found he playing computer games last eveningwhy not use His mother found him playing computer games last evening 为什么不用him Don't spend your free time playing computer games.中play为什么要加ing? Bill's mother often tells him ----spend too muchtime playing computer games为什么填not to playing computer games is very interesting 为什么用is希望可以详细点,谢谢