Question

His good nature should not be forgotten.(Change to affirmative)

Answer 1

Answer:

His good nature should be remembered

Answer 2

Answer:

His good nature should be remembered. (without changing the meaning)

or

His good nature should be forgotten. (with changed meaning)

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.