是at no time:

adv. 决不，从不

At no time did I give my consent to the plan.

我从未同意过这项计划。I have never been to Africa.

我从来没有去过非洲。

I will never do anything to betray you.

我决不会做任何背叛你的事。

How could he drop out? Never!

他怎么会辍学呢绝对不会！