it was not until midnight that he went续:back home after the experiment.什么句型?not一定要提前吗?

问题描述:

it was not until midnight that he went
续:back home after the experiment.什么句型?not一定要提前吗?

这是强调句,意思说:直到半夜他才实验完回家,强调到半夜才回家,not一定要提前