“我一生中从未见过他”是一个否定句。

"I've never seen him in my life" is a ___negative sentence.

“Don't”和“do not”是“do”的否定形式。

"Don't" and "do not" are ___negative forms of "do."

带有“no”的句子通常是否定句。

A sentence with 'no' is usually ___negative.