time playing games 为什么用ing形式

We s______much time playing computer games. time playing games 为什么用ing形式 i spend much time playing games.请问,playing games在句中是什么成分 Playing computer games ________ too much of his studying time. 适当形式填空：Playing computer games means ( )time.(waste) My sister is playing computer games.I'm playing computer games.(将两句合为一句) then,we should limit their time and places of playing computer games.places of playing computer games. 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 Playing computer games wastes a lot of time.Playing computer games wastes a lot of time.what _____ a lot of time. You shouldn't spend too much time playing computer games.(同义句)____ ____ too much time piaying computer games. Peter spends a lot of time playing video games.同义句 Peter( )a lot of time( )video games. 是It is a waste of time to play computer games 还是Playing computer games is a waste of time Don't w___ your time playing computer games all the time.(首字母填空) spend time on playing games正确吗?spend time on sth .可是我的老师讲的是spend time on playing computer games.playing computer games 不然这是错误的吗? I used to spend a lot of time playing games with my friends.这里为什么是piaying ,ing的形式这是不是ing的时态 Young man shouldn't waste much time in playing computer games,...Young man shouldn't waste much time in playing computer games,反义疑问句 You are playing computer games,aren't you?Yes,but this is the first time I ＿ computer games