I just want to see if these are correct.

Orig.1.He was sad to leave. (superlative)
S/B 1. He was saddened to leave.

Orig. 2. She ran as fast as the others on the team (comparative)

S/B 2. She ran faster than the others ran on the team

Orig. 3. Throughout school, they were good in math (superlative)

S/B 3. Throughout school, they were better in math.

Orig. 4. This class is as interesting as the European history class (comparative)

S/B 4. This class is as interesting as the European history class is.

Orig. 5 - He arrived as soon as I did (comparative)

S/B 5. He arrived as soon as I arrived.

Orig. 6. The test was as hard as we expected (superlative)

S/B 6. The test was most hard as we expected.

Orig. 7. He responded to the interviewer as candidly as Tom. (Comparative)

S/B 7. He responded to the interviewer as Tom responded.

Orig. 8. The beggar had less possessions than she. (superlative)

S/B 8. The begger lesser possessions than she had.

Orig. 9. That answer is perfectly correct. (superlative)

S/B 9. That answer is more perfectly correct.

Orig. 10. She read the part best (comparative)

S/B 10. She read the part better.

Are you clear on what comparatives and superlatives are?
standard = GOOD
comparative = BETTER
superlative = BEST

standard = PRETTY
comparative = PRETTIER
superlative = PRETTIEST

standard = BEAUTIFUL
comparative = MORE BEAUTIFUL
superlative = VERY BEAUTIFUL


Orig.1.He was sad to leave. (superlative)
S/B 1. He was saddened to leave.
The superlative of "sad" is either "saddest" or "very sad" or "most sad." Now rewrite the sentence.

Orig. 2. She ran as fast as the others on the team (comparative)

S/B 2. She ran faster than the others ran on the team
OK, except remove the word "ran."

Orig. 3. Throughout school, they were good in math (superlative)

S/B 3. Throughout school, they were better in math.
The superlative of "good" is "best" not "better."

Orig. 4. This class is as interesting as the European history class (comparative)

S/B 4. This class is as interesting as the European history class is.
The comparative of "interesting" is "more interesting." Now rewrite the sentence.

Orig. 5 - He arrived as soon as I did (comparative)

S/B 5. He arrived as soon as I arrived.
Comparative = "sooner"

Orig. 6. The test was as hard as we expected (superlative)

S/B 6. The test was most hard as we expected.
Try using "very hard" and then rewrite the sentence.

Orig. 7. He responded to the interviewer as candidly as Tom. (Comparative)

S/B 7. He responded to the interviewer as Tom responded.
Comparative = "more candidly"

Orig. 8. The beggar had less possessions than she. (superlative)

S/B 8. The begger lesser possessions than she had.
<b?Superlative = "least" or "fewest"

Orig. 9. That answer is perfectly correct. (superlative)

S/B 9. That answer is more perfectly correct.
<b?Superlative = "most perfect(ly)" or "very perfect(ly)"

Orig. 10. She read the part best (comparative)

S/B 10. She read the part better.
Good; "better" is correct, but you need to complete the comparison -- "better" than whom?

=)

http://grammar.ccc.commnet.edu/grammar/adjectives.htm
Scroll down until you see the section called Degrees of Adjectives.

=)

There once lived a very greedy king

Thank you for providing the answers. However, it seems that some of the answers are not correct. Let's go through each sentence and determine the correct answers together.

1. Orig. 1: "He was sad to leave" (superlative)
S/B 1: "He was the saddest to leave"
The superlative form of "sad" is "the saddest." So, the correct answer is "He was the saddest to leave."

2. Orig. 2: "She ran as fast as the others on the team" (comparative)
S/B 2: "She ran faster than the others on the team"
The comparative form of "fast" is "faster." So, the correct answer is "She ran faster than the others on the team."

3. Orig. 3: "Throughout school, they were good in math" (superlative)
S/B 3: "Throughout school, they were the best in math"
The superlative form of "good" is "the best." So, the correct answer is "Throughout school, they were the best in math."

4. Orig. 4: "This class is as interesting as the European history class" (comparative)
S/B 4: "This class is more interesting than the European history class"
The comparative form of "interesting" is "more interesting." So, the correct answer is "This class is more interesting than the European history class."

5. Orig. 5: "He arrived as soon as I did" (comparative)
S/B 5: "He arrived sooner than I did"
The comparative form of "soon" is "sooner." So, the correct answer is "He arrived sooner than I did."

6. Orig. 6: "The test was as hard as we expected" (superlative)
S/B 6: "The test was very hard as we expected"
The superlative form of "hard" can be "very hard." So, the correct answer is "The test was very hard as we expected."

7. Orig. 7: "He responded to the interviewer as candidly as Tom" (comparative)
S/B 7: "He responded to the interviewer more candidly than Tom"
The comparative form of "candidly" is "more candidly." So, the correct answer is "He responded to the interviewer more candidly than Tom."

8. Orig. 8: "The beggar had less possessions than she" (superlative)
S/B 8: "The beggar had fewer possessions than she did"
The superlative form of "less" can be "fewer." So, the correct answer is "The beggar had fewer possessions than she did."

9. Orig. 9: "That answer is perfectly correct" (superlative)
S/B 9: "That answer is the most perfectly correct"
The superlative form of "perfectly correct" can be "the most perfectly correct." So, the correct answer is "That answer is the most perfectly correct."

10. Orig. 10: "She read the part best" (comparative)
S/B 10: "She read the part better than anyone else"
The comparative form of "good" is "better." So, the correct answer is "She read the part better than anyone else."

Please note that the correct answers provided here are just one possible option. There can be other correct answers based on the context and intended meaning of the sentences.