Answer :
Answer:
1.Mary isn't prettier than Stella.
3.A jackal isn't clever than fox.
Answer:
To change Affirmative sentences to negative sentences, we just have to add "not".
[tex]\rule[22]{225}{2}[/tex]
So, The sentences will be :
1) Mary is not prettier than Stella.
2) They have not unaccepted the invitation for the party.
3) A Jackal is not cleverer than a Fox.
Hope this helped!
~AnonymousHelper1807