关于be going to 的用法

Question

I'm going to go to the library.这句话应该不对吧？I’m going to library.应该也不对吧？

I‘m going to the library.对吧？请高手把be going to 的用法解释一下，不要下载，请自己阐述，非常感谢。

Answer 1

I'm going to the library. 我“正”去图书馆。是现在进行时be + 动词ing。
I'm going to go to the library. 我“将要”去图书馆。是现在将来时be going to + 动词原形，第二个go才是谓语动词“去”。

Answer 2

是瞬时间动词，be going ,就表示将来时，所以去某地，直接用be going to somewhere(地名)

Answer 3

be going to 表将来 后接动词原形 =will +do

Answer 4

I'm going to the library.

I’m going to the library.

Answer 5