例如 A:many people like watching others play game. B:many people like to watch others playing game. 你能告诉我吗?(1)在A句中为什么用不定式play 而在B中却用playing(2)假若把to watch 换成often 可以吗?(3)动名词短语和不定式短语在句中若做其它成分可以吗。那短语里面的watching to watch会改变吗