Question

'Smoking is more harmful than drinking.' Change the above sentence into interrogative .?

• A. Is smoking more harmful than drinking?
• B. Isn't smoking more harmful than drinking?
• C. smoking isn't more harmful than drinking?
• D. Isn't smoking harmful than drinking?

Answer 1

Answer:

B. Isn't smoking more harmful than drinking?

• Assertive - subject + auxiliary verb + remaining part 
• Interrogative - auxiliary verb +  not + subject +remaining part 

eg:

• Assertive : Smoking is more harmful than drinking.
•  Interrogative: Isn't smoking more harmful than drinking?