swim 为什么这在进行时 变成swimming?

swim 为什么这在进行时 变成swimming? swim为什么变成swimming? SWIM Swim swim swim要怎么变成现在进行时啊~要怎么改变? 为什么swim的现在进行时是swimming.play的现在进行时是playing? 为什么swim的现在进行时是swimming.play的现在进行时是playing? 一个过去进行时的语法问题正在学语法,学到过去进行时里面有这么一个例句：I often went to swim while was living in Kenting.在这里书上把to swim和was living标了出来疑问来了：为什么swim仍然使用动词 为什么有的现在进行时的单词是这样：write---writing 而不是：swim---swimming呢?( 就是swim结尾有双写m,有的单词没双写,就是上面的write.) swim过去式和进行时代 shop和swim的用法我经常在书上看到shopping和swimming,为什么不是现在进行时还要用现代分词 swimming是swim的进行时吗?为什么是ming/ Jihn,please swim in the river.改为现在进行时 my brothers can swim fast.(改成现在进行时） The children are going swim.为什么swim不用加ing?这是我们英语老师说的, Do you like ( ) (swim) 为什么. I can help kids ___ (swim)swim为什么用原形