You must on no condition tell them what happened.

你决不能告诉他们所发生的事。

On no condition must you be late.

在任何情况下都不能迟到。

You should on no condition visit that place.

你绝不能去那个地方。

You must on no condition climb that high wall.

你绝对不要爬那堵高墙。

You must on no condition climb that high wall.

你绝对不要爬那堵高墙…回答者。