Question

we have not done this to any other nation (make affirmative sentences)​

Answer 1

Answer:

we do not done this to any other nation

Answer 2

Answer:

We have done this to no other nation. (Without changing the meaning of the sentence)

or

We have done this to other nations. (Changed meaning of the sentence)

Explanation:

An assertive or affirmative sentence is a sentence that affirms or asserts that something is true. It does not negate a proposition. In simple words, we don’t use the word ‘not’ in these sentences.  

So according to the definition the given sentence can be converted into an affirmative sentence as shown below:

I am very much sure now.

or

I am exceedingly sure now.

Or

I am definitely sure now.