a) They will attend the party.
Will they attend the party?
b) She did not offend me.
Did she not offend me?
c) He does not know the answer.
Does he not know the answer?
d) They were impressed with her performance.
Were they impressed with her performance?
e) He did not complete the work.
Did he not completer the work?
f) I can solve this problem.
Can I solve this problem?