是 How is it going? 可能是连读比较快才听成了How is going
How is it going等于how are you doing ,what's going on 就是问你怎么样
回答一般就是 it goes well; everything goes well; pretty good 这种
如果是 How + be + something going? 表示 ....进展如何?
例如: How is your work going? 你工作怎么样了? 工作顺利吗?
希望对您有帮助。