Do you want to go swimming on Saturday?请问：swimming为什么是进行时态?

题目

Do you want to go swimming on Saturday?请问：swimming为什么是进行时态?
你要是它前面will我还能明白是将来时,但前面是go啊,这是怎么回事?
是不是动名词的意思？动词与动词之间，要么用动词不定式to do，要么用动名词go doing那？

答案