Question

was no 和 was not 有什么不同？

Answer 1

这两个的区别需要在语境中区别：
1. was no 1) There was no books in the box. 箱子里没有书。（此处意为：没有）
2）It was no good saying that. 那样说没有好处。（此处意为：没有）
2.was not 1）He wasn't very happy yesterday. 昨天他不太高兴。（此处意为：不是）
2) was not any = was no
There was not any books in the box. 箱子里没有书。（此处意为：没有）

Answer 2

was no 是“毫无、一点也没有”，语气比较重；而was not是“没有”，语气平淡。

Answer 3

一般没有was no这个用法 但no后面跟名词连成句 如There was no people here 而was not是was的否定形式