swim的名词形式是swimming,还是swimmer那为什么swim的名词形式是swimming我做了swimmin

swim的名词形式是swimming,还是swimmer那为什么swim的名词形式是swimming我做了swimmin swim的名词形式 Alice is good at___(swim) 是用swimmer还是swimming swim做名词的时候同swimming有什么区别? 英语问题请教：go swimming 这个词组里的swim为什么会是分词形式?谢谢! do you enjoy swimming? swim 既是动词也是名词那swimming为什么不能改为swim swim的名词形式是什么 swim可以作名词为什么是go swimming 而have a swim swim有名词的含义为什么还要用go swimming呢?同样的,go shopping? Let"s go for a swim中的swim可以换成swimming吗swim在这里是名词 swimmming也可 I went to swimming.swimming不是swim的ing形式吗?它在这个句子中做什么成分,为什么不用s 是swim team 还是swimming team?