我没有一句否定的话可说。

I have not a word of denial.

youdao

大家都认为这条属性令人费解，因为它读起来像是一个双重否定句，但是在默认情况下，数据库中所有已读的和未读的文档都会被跟踪。

Admittedly, this property is a confusing one because it reads like a double negative, but by default, all read and unread documents are tracked in a database.

youdao

我认为使用unless加else条件句就好像在讲双重否定。

I think using unless with else is like speaking with double negatives.

youdao

or you can use an "I don't think" question, which, of course, is very similar, only in the negative version of the "I think" question.

当然，你也可以使用“I don't think”的句型，它与“I think”句型十分类似，只不过是以否定句的形式表示。

I think 课堂 - SpeakingMax英语口语达人