Not until I came home last night did Mum go怎么改成强调句?

问题描述:

Not until I came home last night did Mum go怎么改成强调句?

It was when I came home last night that Mom went.

It was not until I came home last night that Mum went.
It is/was.....that(加句子)/who(加人).....
看句子的时态

It was not until I came home last night that Mum went.

it was last night that i did not come home until mum went

以上都不对,应该是:
It was not until I came home last night that Mum went.

Mum went not until I came home last night~~~