I. Rewrite using "too...to" or "enough...to".

1. This road is too dangerous at night.

This road is not safe enough at night.

2. The lesson was not interesting enough.

The lesson was too boring.

3. Our car is not big enough for all of us to travel.

Our car is too small for all of us to travel.

4. Peter is too lazy to get promoted.

Peter is not hard-working enough to get promoted.

5. She is not old enough to live on her own.

She is too young to live on her own.

6. He is too short to play basketball.

He is not tall enough to play basketball.

7. They are not rich enough to afford a holiday.

They are too poor to afford a holiday.

8. The wall was too high for them to climb.

The wall was not low enough for them to climb.

II. Combine these sentences, using "too/enough...to"

1. The children are very excited. They can't wait to open their presents.

The children are too excited to wait to open their presents.

2. They are experienced. They can apply for the job.

They are experienced enough to apply for the job.

3. Jennifer is very careless. She can't take care of her baby sister.

Jennifer is too careless to take care of her baby sister.

4. The presentation of the book was very boring. We couldn't attend it.

The presentation of the book was too boring for us to attend.

5. The supermarket is near. We can go on foot.

The supermarket is near enough for us to go on foot.

6. She was very angry. She couldn't speak.

She was too angry to speak.

7. These shoes are comfortable. You can wear them all day long.

These shoes are comfortable enough for you to wear them all day long.

III. Combine these sentences, using "so/such...that"

1. Jim gave a good explanation. Even Bob understood the lesson.

Jim gave such a good explanation that even Bob understood the lesson.

2. The painting is valuable. It has to be kept locked up.

The painting is so valuable that it has to be kept locked up.

3. He plays music well. He is always in demand at parties.

He plays music so well that he is always in demand at parties.

4. My house is a long way from here. We'll need two hours to reach it.

My house is such a long way from here that we'll need two hours to reach it.

5. The TV programme was good. We all enjoyed it.

The TV programme was so good that we all enjoyed it.

IV. Rewrite the sentences with "SO" instead of "SUCH" or "SUCH" instead of "SO".

1. The weather is so cold today that we can't go on a picnic.

It is such cold weather today that we can't go on a picnic.

2. Yasmin is so beautiful that everybody is jealous of her.

Yasmin is such a beautiful girl that everybody is jealous of her.

3. It is such a pretty dog that I'd like to take it to my house.

The dog was so pretty that I'd like to take it to my house.

4. It was such a nonsense game that Arda couldn't understand it.

The game was so nonsense that Arda couldn't understand it.

5. John is so honest that everybody trusts him.

John is such a honest person that everybody trusts him.

6. It is such an exciting book that I can't put it down.

The book is so exciting that I can't put it down.

7. Istanbul is such a crowded city that I can't live there for a long time.

Istanbul is so crowded that I can't live there for a long time.

8. We had such little time that we went there by bus.

We had so little time that we went there by bus.

9. The dogs are such clever animals that they can understand everything you said.

The dogs are so clever that they can understand everything you said.

10. My room is so big that I can call all my friends.

My room is such a big room that I can call all my friends.

V. Combine the sentences. 

1. My grandfather is very energetic. He can run ten miles. (so ... that)

My grandfather is so energetic that he can run ten miles. 

2. She was late. She couldn't have breakfast. (too)

She was too late to have breakfast. 

3. Rafael is a talented tennis player. He can win all the tournaments. (such ... that)

Rafael is such a talented tennis player that he can win all the tournaments.

4. Laura is very young. She can't drive a car. (enough)

Laura is not old enough to drive a car.

5. The ganden is very big. We can plant lots of trees and flowers there. (so ... that)

The ganden is so big that we can plant lots of trees and flowers there.

6. It is very cold. We cannot play outside. (too)

It is too cold for us to play outside.

7. Helen isn't short. She can wear that dress. (enough)

Helen isn't tall enough to wear that dress. 

8. She hasn't got much amoney. She can't go to Madzid. (enough)

She hasn't got enogh amoney to go to Madzid.

9. Everybody was very excited. They couldn't wait the announcement. (so ... that)

Everybody was so excited that they couldn't wait the announcement.

10. George is an extravagant man. He buys whatever he sees. (such ... that)

George is such an extravagant man that he buys whatever he sees. 

11. Mag is lovely. She has many friends. (so ... that)

Mag is so lovely that she has many friends.

12. Samantha is a shopaholic girl. She spends all her time to do shopping. (such ... that)

Samantha is such a shopaholic girl that she spends all her time to do shopping.

13. Amber is so hardworking that she can pass all the tests she has. (such ... that)

Amber is such a hardworking student that she can pass all the tests she has. 

14. Arthur is too sleepy to finish his work. He can't do it. (so ... that)

Arthur is so sleepy that he can't finish his work.

15. My father is young enough to play football. (too)

My father is too old to play football. (too)

16. Margaret's dress was so long that she couldn't walk. (such ... that)

Margaret's dress was such a long dress that she couldn't walk. 

17. The girls were so exhausted that they couldn't eat their meal. (too)

The girls were too exhausted to eat their meal. 

18. We didn't have enough courage to open the door of the haunted house. (too)

We were too afraid to open the door of the haunted house. (afraid: sợ)

19. It was such an old car that I thought it would fall apart. (so ... that)

My car was so old that I thought it would fall apart.

20. The students were too reluctant to solve the problems. (enough)

The students were not enthusiastic enough to solve the problems. (reluctant: không sẵn lòng >< enthusiastic: nhiệt tình)

1. Cấu trúc với "enough ...to": đủ ...để làm gì

1.1. Đối với tính từ:
Cấu trúc: S + be + adj + enough + (for somebody) + to V

1.2. Đối với trạng từ:
Cấu trúc:  S + V + adv + enough + (for somebody) + to V

1.3. Đối với danh từ:
Cấu trúc: S + V/tobe + enough + noun + (for somebody) + to V
*** Lưu ý: 
- "Enough" đứng sau tính từ và trạng tự nhưng đứng trước danh từ.
- Ở dạng phủ định ta chỉ việc thêm "not" vào sau động từ "to be" hoặc thêm trợ động từ "don't/ doesn't/ didn't" tuỳ theo chủ ngữ và thì của câu vào trước động từ thường.

2.1. Đối với tính từ:
Cấu trúc: S + be + too + adj + (for somebody) + to V

2.2. Đối với trạng từ:
Cấu trúc: S + V + too + adv + (for somebody) + to V

3. Cấu trúc với "so...that...": quá ... đến nỗi
3.1. Đối với tính từ: 
Cấu trúc: S + be+ so + adj + that + S + V

3.2. Đối với trạng từ:
Cấu trúc: S + V + so + adv + that + S + V

3.3. Đối với danh từ đếm được:
Cấu trúc: S + V+ so many/ few + plural/ countable noun + that + S + V

3.4. Đối với dnah từ không đếm được:
Cấu trúc: S + V + so much/ little + uncountable noun + that + S + V

4. Cấu trúc "such...that": thật là ... đến nỗi
Cấu trúc: S + V + such + (a/an) + adj + noun + that + S + V