Complete the comparative or superlative form of the adjectives: 0. They say that tomorrow will be the coldest day of the year! (cold) 1. Mike's sports car is ....................... than mine. (expensive) 2. Travelling by train is ....................... than travelling by plane. (cheap) 3. Which is the ....................... mountain in the world? (high) 4. John is said to be the ....................... student in his class. (clever) 5. He is ....................... than his brother. (responsible) 6. It is much ....................... today than it was yesterday. (warm) 7. He got ....................... grades than his fellow students. (good) 8. I believe that this project is the ....................... of all. (hard) 9. Don't you think that football is ....................... than tennis? (exciting) 10. This is the ....................... airport in the world. (big) 11.It was the ....................... film I had ever seen! (bad) 12. Tom is much ....................... today than yesterday. (happy) 13. She is the ....................... person we have ever met. (nice) 14. Sandra thinks that she is the ....................... girl in her class. (beautiful) 15. Your suitcase is ....................... than mine. (heavy)

Here are the answers with explanations: 1. Mike's sports car is **more expensive** than mine. (expensive) *Explanation: Since we are comparing two things (Mike's car and "mine"), we use the comparative form. 'Expensive' is a longer word, so we use 'more' + the adjective.* 2. Travelling by train is **cheaper** than travelling by plane. (cheap) *Explanation: Comparing two options (train vs. plane), so comparative. 'Cheap' is a short word, so we add '-er'.* 3. Which is the **highest** mountain in the world? (high) *Explanation: We are asking about the mountain out of all mountains in the world (a superlative case). 'High' is a short word, so we use '-est'.* 4. John is said to be the **cleverest** student in his class. (clever) *Explanation: John is being compared to all the other students in his class, making this superlative. 'Clever' is a short word, we add '-est'.* 5. He is **more responsible** than his brother. (responsible) *Explanation: Comparing him to his brother, therefore comparative. 'Responsible' is a longer word, so 'more' + the adjective is used.* 6. It is much **warmer** today than it was yesterday. (warm) *Explanation: Comparing today's weather to yesterday's, thus comparative. 'Warm' is a short word, thus '-er' is added.* 7. He got **better** grades than his fellow students. (good) *Explanation: Comparing his grades to others, hence comparative. 'Good' has an irregular comparative form: 'better'.* 8. I believe that this project is the **hardest** of all. (hard) *Explanation: This project is being compared to all others (superlative). 'Hard' is short, add '-est'.* 9. Don't you think that football is **more exciting** than tennis? (exciting) *Explanation: Comparing football to tennis (comparative). 'Exciting' is long, use 'more' + adjective.* 10. This is the **biggest** airport in the world. (big) *Explanation: Comparing this airport to all others in the world (superlative). 'Big' is short. Note the double 'g' because of the short vowel preceding the consonant.* 11. It was the **worst** film I had ever seen! (bad) *Explanation: This film is compared to all the films he's seen (superlative). 'Bad' has an irregular superlative form: 'worst'.* 12. Tom is much **happier** today than yesterday. (happy) *Explanation: Comparing Tom's happiness today to yesterday (comparative). 'Happy' becomes 'happier'. (y changes to i)* 13. She is the **nicest** person we have ever met. (nice) *Explanation: She is compared to everyone we've ever met (superlative). 'Nice' + '-est' = nicest.* 14. Sandra thinks that she is the **most beautiful** girl in her class. (beautiful) *Explanation: Compared to all the girls in the class. 'Beautiful' is long, so 'most' + adjective.* 15. Your suitcase is **heavier** than mine. (heavy) *Explanation: Comparing two suitcases. 'Heavy' becomes 'heavier'.(y changes to i)*