I'm not old enough to drive a car
i wish I were old enough to drive a car

2. the group plans to establish an import business.(SET)

the group plans to up an import business

3.They're not sure how they should operate the new system. (TO)

-->They're not sure how to operate the new system

1 If you don't finish your homework, you can't go out with your friend

2 They are not sure how to operate the new system

1. If you don't finish your hw, you won't be able to go out with your friend

2, They don't know how to operate the new system

1, Finish your homework or you can't go out with your friend (if)

2, They're not sure how they should operate the new system (to)

They're not sure how to operate the new system.

3, It took me 4 hours to read the first chapter of the book (spent)

I spent 4 hours reading the first chapter of the book.

4, Snowboarding is more dangerous than tennis ( as )

Tennis isn't as dangerous as snowboarding.

1, Finish your homework or you can't go out with your friend (if)

.........If you don't Finish your homework , you can't go out with your friend ..............

2, They're not sure how they should operate the new system (to)

........They're not sure how to operate the new system................

3, It took me 4 hours to read the first chapter of the book (spent)

.........I spent 4 hours reading the first chapter of the book............

4, Snowboarding is more dangerous than tennis ( as )

.............Tennis isn't as dangerous as Snowboarding .....................

1 ìf you finsih your homework, you could go out with your friend

XI.Complete the second sentence so that it has a similar meaning to the first sentence,using the word in capital

1.He said he wouldn't have enough time ti finish the job(Will)

he said "i won't have enough time ti finish the job"

2.When đi your friends eat that chocolate cake?(was)

when was that chocolate cake eaten by your friend

3."What are the skills you concern most"my teacher asked(I)

i was asked by my teacher what the skills i concerned most

4.I have never read such an interesting novel á The Little Prince(Most)

the little prince is the most interesting novel i have ever read

5.Finish your homeword or you can't go out with friend(If)

if you finish your homwork, you can go our with friend

6.They're not sure how they shold operate the new system(to)

they are not sure how to operate the new system

7.It took me 4 hours to read the first chaper of the book(spent)

i spent 4 hours reading the first chaper of the book

8.Snowboaring is more dangerous than tennis(as)

tennis is not as dangerous as snowboarding

1 get on => get on with

2 what => how

3 sitting => taking

4 more hard => harder

5 during => when

11 get on-> get on with     

12 what thành how

13 sitting => taking  

14 more hard => harder

15 

stressful -> stressed

17. We don't know how to solve the problems.

18. Hoa was not sure when to break the sad news to him.

1. What should I say? He can't think.
2. Where shall we go? They are not sure.
3. Where do we put the sofa? We do not know.
4. What should I write my home paper about? I have no idea.
5. How should I start the engine?  No one could tell.

1 He can't think 

2 They aren't sure

3 We don't know

4 I have no idea of it

5 No one could tell 

Rewrite the sentences using question words + to infinitives

1.I can't decide what I should wear to the party tonight

I can't decide what to wear to the party tonight

2.Could you tell me where I should hang these picture

Could you tell me where to hang these picture ?

3.I have not idea when I should leave for the bus

I have no idea when to leave for the bus

4.We're not sure where I should keep these files

We're not sure where to keep these files

5.He wondered how he can tell this news to his parents

He wondered how to tell this news to his parents

6.They can't decide who they should meet firt

They can't decide who to meet first

7.I'm so confused and I don't know that I should do now

I'm so confused and I don't know what to do now

8.The children must know when they have to go to bed

The children must know when to go to bed

1. I don't know, " should I go to the dentist?"
=> I don't know whether to go to the dentist
2. I have no idea, "how should I solve this problem?"
=>I have no idea how to solve this problem
3. I was not sure, "should I go home now?"
=>I was not sure whether to go home now