Playing football is difficult.为什么用Play+ing ,

he is playing football .画线部分 football. he is playing football用playing football提问 my teacher is playing football对playing football提问 Let is playing football 还是Let is play football? playing football in the street is d football at she playing good is They ()football in the playground.a:playing.b:am playing.c:are playing.d:is playing. tom is playing --------his frend ,beety is playing -------piano ,jack is playing ------football Simon is playing football with some boys.对is playing football提问赶者睡觉啊 She is interested in playing football.(保持原句意思)She is _______ _______ playing football. Playing football is interesting He is playing football 怎样分主谓宾吖 Jack does well in playing football.Jack is _____Jack does well in playing football.Jack is _________ _________playing football. Jack likes playing football(保持句意不变) Jack is _______ _________ playing football My brother is playing football.改为否定句 My brother（ ）playing football. ( ) your friends playing football?No A.( ) your friends playing football?No A.areB.doC.is Look!The boys[ ]football together.A.playing B.are playing C.is playing选择 His hobby is playing football这里play为什么加ing Playing football is difficult.为什么用Play+ing ,