为什么shopping people不能表示正在购物的人们?不是说现在分词作定语表示正在进行吗?

为什么是many people going shopping为什么用going为什么一定是many girls enjoy going shopping，而不能是many girls enjoy go shopping 为什么正在购物的人不能翻译成shopping people?现在分词作定语不是表示正在进行吗? 为什么shopping people不能表示正在购物的人们?不是说现在分词作定语表示正在进行吗? A lot of people go out shopping or visiting friends at weekends.shopping 和visiting 为什么用ing形式 为什么people能用many修饰,audience不能 为什么没有shopping people（正在购物的人）?动名词做定语不是表示正在进行吗 为什么shopping people是不对的?不是动名词做定语表示正在进行吗 many people are shopping in the large shopping 为什么不能填too Mary won't go shopping this afternoon.I won't go,------------ 我想问个英文问题,‘我打算购物“,用I am going to shopping,还是I am going to go shopping想问一下to 后面能不能直接shopping,如果不能,请告之为什么不能,谢谢! “正在购物的人们”是不是shopping people 英语翻译People are doing their Christmas shopping. many people like shopping in it. Now many people take their own bags when shopping为什么加ing,前面不是用的一般现在时吗? Mary with her friends ____ for the whole afternoon.a.shopped b.was shopping c.have been shoppingd.has been shopping 为什么不能选a Is your mother at home?No,she( )shopping.为什么中间只能填has gone而不能填goes呢? going shopping,为什么shopping还要加ing?赶着要, 是went shopping 还是went to shopping,为什么?