Question

it was not 用法

例句：It was not so much having to walk a mile along the dusty streets of Croydon, followed by the small boys that I minded.

Answer 1

What i minded is not having to ...but the fact that most of my friends...
此句中有两个结构：一是强调句， it was ... that i minded
另一个是not...but 。。的结构
再看下一个句子：
What i do like is not the color of the dress but its style.
变成it is not 的句型为：
It was not the color of the dress that i do like, but its style.

Answer 2

1) it is/was not that 从句： it is not that ...., but that.....不是。。。而是。。。
2) it is/was not until ....

it was/is not, 并不是/并没有 .... 用法很多，看具体的语境了，语法中最喜欢考的就是强调句。