I practise playing the piano中“playing”为什么要加ing?

I spend much time ________(practise) playing football every day. they wish that the boy______the violin last nighta.didn't practise to play b.wouldn't practise to be playing c.hadn't practise playing d.wouldn't have practise being playing 对划线句子提问Every Wednesday afternoon I practise playing volleydall with classmates划线句子：practise playing volleydall I practise playing the piano中“playing”为什么要加ing? I practise (playing the piano) every day.对括号部分提问() do you () () every day? i practise playing volleyball with my classmates after school every day对my l will practise playing basketball为森么要用practise _____?—I went to Beijing with my mother.A.practising to play B.practising playingC.to practise to play D.to practise playing I don't have much energy _______ (practise).I'm tried Dad,I have finished _______ my clothes;can I go and practise _-_____ basketball?A.wash;play B .washing;playingC.washing; to play D.to wash;playing 1、They often chat with each other in the piayground[after class].提问【】【】【】often chat with each other in the piayground?2、I practise playing volleyball with [my classmates] after school every day.提问【】【】you practise playi practise practise I practise playing the piano every morning.用just now改写句子We want to see the tigers first.改为祈使句 词形变化MIKE playing the violin every day .(practise) I like playing _______ basketball but I don't like playing ___________piano I don't like playing basketball ,but I like playing c______ . Every day I see a six-year-old girl practise playing basketball there.这句话的playing为什么要用 ing形式?不能直接用play 应该是一般现在时啊.