HE IS A BOY THAT LIKES PIALING BALLS.PLAY为什么要加ING?

HE IS A BOY THAT LIKES PIALING BALLS.PLAY为什么要加ING? he likes playing basketball.他喜欢打篮球 .为什么play要加ing he is (-----)a clever boy that everyone likes him He likes playing football very mucy ==play为什么加ING He likes reading.这里read为什么要加ing? he likes reading .为什么read要加Ing? he is a bad boy,he likes to play jokes --- others. Tom likes playing football 这里play为什么要加ing 还有like为什么加S Ben likes playing the trumpet.为什么play要加ing?急…… he is a boy,likes playing football./he is a boy and he likes she likes swimming 为什么要加ing When is he going to play the piano?为什么加ING