er and est - Free Printable

Problem Explanation:

The task involves choosing the correct comparative (`-er`) or superlative (`-est`) form of adjectives based on the context provided in each sentence. The rules are as follows:
- Use `-er` when comparing two things.
- Use `-est` when comparing three or more things.

Solution with Explanations:

1. Susan got the (higher, highest) marks in class.
- Context: Comparing Susan's marks to others in the class (more than two people).
- Correct Answer: highest
- Explanation: Since it is a comparison among multiple students, the superlative form (`-est`) is used.

2. Block A is (higher, highest) than Block B.
- Context: Comparing Block A and Block B (two things).
- Correct Answer: higher
- Explanation: Since it is a comparison between two blocks, the comparative form (`-er`) is used.

3. Farah is (taller, tallest) than Wajiha.
- Context: Comparing Farah and Wajiha (two people).
- Correct Answer: taller
- Explanation: Since it is a comparison between two individuals, the comparative form (`-er`) is used.

4. Burj Khalifa is the (taller, tallest) building in the world.
- Context: Comparing Burj Khalifa to all other buildings in the world (many buildings).
- Correct Answer: tallest
- Explanation: Since it is a comparison among many buildings, the superlative form (`-est`) is used.

5. Cheetah is the (faster, fastest) land animal.
- Context: Comparing cheetahs to all other land animals (many animals).
- Correct Answer: fastest
- Explanation: Since it is a comparison among many land animals, the superlative form (`-est`) is used.

6. John walks (faster, fastest) than his brother.
- Context: Comparing John's walking speed to his brother's (two people).
- Correct Answer: faster
- Explanation: Since it is a comparison between two individuals, the comparative form (`-er`) is used.

7. This yellow frock is the (brighter, brightest) of all.
- Context: Comparing the yellow frock to all other frocks (many frocks).
- Correct Answer: brightest
- Explanation: Since it is a comparison among many frocks, the superlative form (`-est`) is used.

8. Usain’s shirt is (brighter, brightest) than mine.
- Context: Comparing Usain’s shirt to your shirt (two shirts).
- Correct Answer: brighter
- Explanation: Since it is a comparison between two shirts, the comparative form (`-er`) is used.

9. Red pencil is (longer, longest) than the yellow pen.
- Context: Comparing the red pencil to the yellow pen (two objects).
- Correct Answer: longer
- Explanation: Since it is a comparison between two objects, the comparative form (`-er`) is used.

10. I took out the (longer, longest) pencil from the box.
- Context: Comparing the pencil taken out to all other pencils in the box (many pencils).
- Correct Answer: longest
- Explanation: Since it is a comparison among many pencils, the superlative form (`-est`) is used.

Final Answers:

1. highest
2. higher
3. taller
4. tallest
5. fastest
6. faster
7. brightest
8. brighter
9. longer
10. longest

Boxed Final Answer:

\[
\boxed{
\text{1. highest, 2. higher, 3. taller, 4. tallest, 5. fastest, 6. faster, 7. brightest, 8. brighter, 9. longer, 10. longest}
}
\]