no matter 常与疑问代词what/which/who/whom...或疑问副词how/when/where...连用,表示"无论..."
eg: No matter what you say, I will go there.
无论你说什么,我都要去那儿.
not matter 通常用于It does not matter的结构,表示"没关系"
eg:----Sorry,I forgot it. (对不起,我忘了)
----It doesn't matter. (没关系)
no matter 不管......和 not matter 没关系
no matter how /what and so on
not matter It does not matter
no matter 无论
not matter 没关系
1不管,不论 。2 没有问题