Comparative adjectives exercise: complete the sentences with the correct form of adjectives using "than" and "as...as".

Task: Fill in the correct form of the adjective in each sentence.

#### Explanation:
Comparative and superlative forms of adjectives are used to compare things. Here's a quick overview:

1. Comparative Adjectives:
- Used to compare two things.
- Formed by adding "-er" to short adjectives (e.g., "short" → "shorter") or using "more/most" for longer adjectives (e.g., "beautiful" → "more beautiful").
- Example: "My brother is taller than my sister."

2. Superlative Adjectives:
- Used to compare three or more things.
- Formed by adding "-est" to short adjectives (e.g., "tall" → "tallest") or using "most" for longer adjectives (e.g., "beautiful" → "most beautiful").
- Example: "She is the tallest girl in the class."

Now, let's solve each sentence step by step:

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1. My brother is ____________ than my sister. (short)

- Comparative form of "short" is "shorter."
- Answer: shorter

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2. I’m as ____________ at football as my best friend. (good)

- The comparative form of "good" is "better," but since it's used with "as...as," we use the base form "good."
- Answer: good

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3. She’s the ____________ ____________ girl in the class. (beautiful)

- Superlative form of "beautiful" is "most beautiful."
- Answer: most beautiful

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4. You are the ____________ person I have ever known. (nice)

- Superlative form of "nice" is "nicest."
- Answer: nicest

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5. Summer is ____________ than winter. (hot)

- Comparative form of "hot" is "hotter."
- Answer: hotter

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6. Houses are ____________ ____________ than flats. (expensive)

- Comparative form of "expensive" is "more expensive."
- Answer: more expensive

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7. This Apple is ____________ than that Apple. (red)

- Comparative form of "red" is "redder."
- Answer: redder

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8. My grandad is the ____________ member in our family. (old)

- Superlative form of "old" is "oldest."
- Answer: oldest

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9. Slovak language is ____________ ____________ than English. (difficult)

- Comparative form of "difficult" is "more difficult."
- Answer: more difficult

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10. You are as ____________ as snow. (white)

- The adjective "white" remains the same in this context.
- Answer: white

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11. Today was the ____________ day in this week. (windy)

- Superlative form of "windy" is "windiest."
- Answer: windiest

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12. Yesterday was ____________ than today. (cloudy)

- Comparative form of "cloudy" is "cloudier."
- Answer: cloudier

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13. This tree is ____________ than the tree in our street. (big)

- Comparative form of "big" is "bigger."
- Answer: bigger

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14. She’s as ____________ as her sister. (famous)

- The adjective "famous" remains the same in this context.
- Answer: famous

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15. Elephant is the ____________ animal in this ZOO. (heavy)

- Superlative form of "heavy" is "heaviest."
- Answer: heaviest

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16. Monday was the ____________ day in this week. (sunny)

- Superlative form of "sunny" is "sunniest."
- Answer: sunniest

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17. It was raining. He was as ____________ as his dog. (wet)

- The adjective "wet" remains the same in this context.
- Answer: wet

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18. Mice are ____________ than cats. (small)

- Comparative form of "small" is "smaller."
- Answer: smaller

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19. Scotland is ____________ than England. (hilly)

- Comparative form of "hilly" is "hillier."
- Answer: hillier

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20. This box is the ____________ in this room. (large)

- Superlative form of "large" is "largest."
- Answer: largest

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21. This summer was as ____________ as the summer in 1976. (dry)

- The adjective "dry" remains the same in this context.
- Answer: dry

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22. This lake is the ____________ in Slovakia. (deep)

- Superlative form of "deep" is "deepest."
- Answer: deepest

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23. Look. These shoes are ____________ than the shoes I have. (flat)

- Comparative form of "flat" is "flatter."
- Answer: flatter

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24. This mountain is as ____________ as Mont Blanc. (high)

- The adjective "high" remains the same in this context.
- Answer: high

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Final Answers:

1. shorter
2. good
3. most beautiful
4. nicest
5. hotter
6. more expensive
7. redder
8. oldest
9. more difficult
10. white
11. windiest
12. cloudier
13. bigger
14. famous
15. heaviest
16. sunniest
17. wet
18. smaller
19. hillier
20. largest
21. dry
22. deepest
23. flatter
24. high

Final Answer:
\boxed{
1. shorter, 2. good, 3. most beautiful, 4. nicest, 5. hotter, 6. more expensive, 7. redder, 8. oldest, 9. more difficult, 10. white, 11. windiest, 12. cloudier, 13. bigger, 14. famous, 15. heaviest, 16. sunniest, 17. wet, 18. smaller, 19. hillier, 20. largest, 21. dry, 22. deepest, 23. flatter, 24. high
}