Question

Interchange the affirmative sentence into negative sentence. All those boys are intelligent .

• A. None of the boys is dull.
• B. All boys are dull.
• C. All boys are not intelligent .
• D. None of these

Answer 1

Answer:

A. None of the boys is dull.

Affirmative sentences are positive sentences. Negatives sentences contains negative words such as not, never, none etc... 'None' is a negative word.