Sure! Here’s your request rewritten with double comparatives:

**Exercise 1:**

1. The apartment is big. The rent is high.
- → The bigger the apartment, the higher the rent.

2. We set off soon. We will arrive soon.
- → The sooner we set off, the sooner we will arrive.

3. The joke is good. The laughter is loud.
- → The better the joke, the louder the laughter.

4. She gets fat. She feels tired.
- → The fatter she gets, the more tired she feels.

5. As he gets older, he wants to travel less.
- → The older he gets, the less he wants to travel.

6. If you read many books, you will have much knowledge.
- → The more books you read, the more knowledge you will have.

7. He speaks too much and people feel bored.
- → The more he speaks, the more bored people feel.

8. The growth in the economy makes people’s living condition better.
- → The more the economy grows, the better people’s living conditions become.

9. He learned a lot of things as he traveled far.
- → The farther he traveled, the more things he learned.

10. The children are excited with the difficult games.
- → The more difficult the games, the more excited the children are.

11. People dive fast. Many accidents happen.
- → The faster people dive, the more accidents happen.

12. I meet him much. I hate him much.
- → The more I meet him, the more I hate him.

13. My boss works better when he is pressed for time.
- → The less time he has, the better he works.

14. As he has much money, he wants to spend much.
- → The more money he has, the more he wants to spend.

**Exercise 2:**

1. As she gets older, she becomes thoughtful.
- → The older she gets, the more thoughtful she becomes.

2. If she practices frequently, she will become a strong athlete.
- → The more frequently she practices, the stronger athlete she will become.

3. If they save money, they can afford nice vacations.
- → The more they save, the nicer the vacations they can afford.

4. As I exercise frequently, I feel healthy.
- → The more frequently I exercise, the healthier I feel.

5. If he speaks fluently, he will gain confidence.
- → The more fluently he speaks, the more confidence he will gain.

6. If they work longer hours, they earn higher salaries.
- → The longer hours they work, the higher the salaries they earn.

7. If she studies more diligently, she will achieve better results.
- → The more diligently she studies, the better results she will achieve.

8. If he practices regularly, he can improve his skills.
- → The more regularly he practices, the more he can improve his skills.

9. If they run faster, they will win more races.
- → The faster they run, the more races they will win.

10. As I read more books, I expand my knowledge.
- → The more books I read, the more I expand my knowledge.

11. If she studies efficiently, she will comprehend complex concepts well.
- → The more efficiently she studies, the better she will comprehend complex concepts.

12. If he exercises hard, he will gain muscle mass.
- → The harder he exercises, the more muscle mass he will gain.

13. As they collaborate effectively, they produce high-quality work.
- → The more effectively they collaborate, the higher the quality of work they produce.

14. If she manages her time strategically, she will achieve great productivity.
- → The more strategically she manages her time, the greater her productivity will be.

15. If he invests wisely, he will earn great financial returns.
- → The more wisely he invests, the greater his financial returns will be.

16. You have knowledge, so you can solve problems by applying that knowledge.
- → The more knowledge you have, the more problems you can solve by applying it.

17. He exercises regularly. He can improve his physical fitness significantly.
- → The more regularly he exercises, the more he can improve his physical fitness.

18. They save money. They can afford more luxurious vacations.
- → The more money they save, the more luxurious vacations they can afford.

19. You should allocate resources efficiently, so that your company's profitability will be high.
- → The more efficiently you allocate resources, the higher your company's profitability will be.

20. We need to work efficiently to complete many tasks in a small amount of time.
- → The more efficiently we work, the more tasks we can complete in a small amount of time.

21. You focus hard on your training. Your chances of breaking the record are great.
- → The harder you focus on your training, the greater your chances of breaking the record.

22. If they practice regularly, they can become good musicians.
- → The more regularly they practice, the better musicians they can become.

23. If she communicates effectively, she will build strong relationships with others.
- → The more effectively she communicates, the stronger relationships she will build with others.

24. You eat healthy food. You can maintain good overall health.
- → The healthier food you eat, the better your overall health will be.

25. When you research the topic diligently, your understanding will be deep.
- → The more diligently you research the topic, the deeper your understanding will be.

26. They communicate persuasively. They influence a lot of people.
- → The more persuasively they communicate, the more people they influence.

27. As she practices mindfulness regularly, she experiences great inner peace.
- → The more regularly she practices mindfulness, the greater inner peace she experiences.

28. He takes risks to achieve high rewards.
- → The more risks he takes, the higher the rewards he can achieve.

29. She takes on challenges to grow as an individual.
- → The more challenges she takes on, the more she grows as an individual.

30. If you start preparing for the exam early, you will feel confident on the test day.
- → The earlier you start preparing for the exam, the more confident you will feel on test day.

**Exercise 3:**

1. The weather gets **colder**.
2. Bob is getting **fatter**.
3. Jim’s situation became **more difficult**.
4. **The older** my grandparents get, **the happier** they are.
5. **The hotter** it is, **the weaker** Hoa is.
6. The company expanded rapidly. It grew **bigger** all the period.
7. Life got **better** for Viet as the company became **more successful**.
8. **The more** we eat, **the fatter** we get.
9. As Microsoft grew, Bill Gates got **richer**.
10. Her job gets **harder** every year.

**Exercise 4:**

1. He was driving **fast** to get to work on time.
2. The price of this famous portrait painting is getting **higher**.
3. Driving in the crowded city is becoming **more difficult**.
4. I have to put on warmer clothes because the weather is **getting colder**.
5. Math exercises are really getting **more difficult** to solve.
6. I caught a cold and it is getting **worse**.
7. She is becoming **more annoying**, I don’t want to talk with her anymore.
8. The mid-term test is next week and I’m getting **more nervous**.
9. He eats too much. He is becoming **fatter**.
10. I don’t know why he is getting **better** at basketball.

**Exercise 5:**

1. People will come to the party so we will need more food.
- → The more people come to the party, the more food we will need.

2. We become older. We will be more understanding.
- → The older we become, the more understanding we will be.

3. This job is easy. We need to finish it quickly.
- → The easier this job is, the quicker we need to finish it.

4. The play lasts too long so the audience becomes bored.
- → The longer the play lasts, the more bored the audience becomes.

5. There are many illegal logging activities, and the environment will be damaged.
- → The more illegal logging activities there are, the more the environment will be damaged.

6. They are big, they fall fast.
- → The bigger they are, the faster they fall.

7. It is hot, I feel miserable.
- → The hotter it is, the more miserable I feel.

8. I look into your eyes much, I love you much.
- → The more I look into your eyes, the more I love you.

9. He got old, he became bad-tempered.
- → The older he got, the more bad-tempered he became.

10. He worked hard. He felt very bad.
- → The more he worked hard, the worse he felt.

11. When we think of the exam, we get more and more excited.
- → The more we think of the exam, the more excited we get.

12. As this road gets busier, it becomes more and more dangerous.
- → The busier this road gets, the more dangerous it becomes.

13. When you get near to the Equator, the temperature becomes high.
- → The nearer you get to the Equator, the higher the temperature becomes.

14. If she stays in England a long time, her English will be very good.
- → The longer she stays in England, the better her English will be.

15. You write fast. Your writing becomes illegible.
- → The faster you write, the more illegible your writing becomes.

16. He works much. He feels tired.
- → The more he works, the more tired he feels.

17. The apartment is big. The rent is high.
- → The bigger the apartment, the higher the rent.

18. We set off soon. We will arrive soon.
- → The sooner we set off, the sooner we will arrive.

19. The joke is good. The laughter is loud.
- → The better the joke, the louder the laughter.

20. She gets fat. She feels tired.
- → The fatter she gets, the more tired she feels.