did you have fun watching the game 里面为什么用watching 而不是 watch

did you have fun watching the game 里面为什么用watching 而不是 watch did you have fun---(watch)the game?为什么要用ing形式? Did you have fun____(watch) the game? Watching TV can help you konw more about the world.为什么用Watch What____you____(watch)?为什么用are;watching? They're watch the game.还是They're watching the game. Do you like watching TV为什么WATCH要加ING Why did you have to sit the game out?句中have 为什么用have to watch tv is fun与watching tv is fun shall we stay at home watching TV tonight?为什么要用watching而不是wa watching game you soccer a are I would have had to have been watching the game.中的have to