A) I enjoyed the concert. (negative) b) You ate all the bread. (question)
c) Did John spend a lot? (affirmative)
d) I felt well yesterday. (negative)
e) Anna didn't buy a car. (affirmative)
f) They won the prize. (question)
g) Paul doesn't speak Greek. (affirmative)
h) I paid all the bills: (negative)​

A) I did not enjoy the concert because I found it boring and uninteresting.
Explanation: The negative form of the sentence is created by adding the word "not" after the verb "enjoy." In this case, I did not have a positive experience at the concert.

B) Did you eat all the bread?
Explanation: To turn the statement into a question, we need to invert the subject "you" and the helping verb "ate." Additionally, we add a question mark at the end of the sentence to indicate it is a question. This is used to inquire about whether or not the person consumed all the bread.

C) John did spend a lot.
Explanation: To make an affirmative sentence, we simply state that John spent a lot without any changes or modifications to the sentence structure or word order.

D) I did not feel well yesterday because I had a headache and an upset stomach.
Explanation: The negative form of the sentence is created by adding the word "not" after the verb "feel." In this case, I did not have a positive physical state yesterday.

E) Anna did buy a car.
Explanation: To make an affirmative sentence, we simply state that Anna bought a car without any changes or modifications to the sentence structure or word order.

F) Did they win the prize?
Explanation: To turn the statement into a question, we need to invert the subject "they" and the helping verb "won." Additionally, we add a question mark at the end of the sentence to indicate it is a question. This is used to inquire about whether or not they were successful in winning the prize.

G) Paul does speak Greek.
Explanation: To make an affirmative sentence, we simply state that Paul speaks Greek without any changes or modifications to the sentence structure or word order.

H) I did not pay all the bills because I forgot to include one of them.
Explanation: The negative form of the sentence is created by adding the word "not" after the verb "pay." In this case, I did not fulfill the responsibility of paying all the bills.