Trả lời: 

1.He has saved money for two years to buy a new car.

2.It is essential for everyone to study English well.

3.We are allowed to go home early by the teacher.

4.It takes him twenty minutes to drive to work every day.

5.We got up early to go to the theatre on time.

=>

1.  He has saved money for two years.He wants to buy a new car.

-> He has saved money for two years to buy a new car.

2. Studying English well is essential for everyone.

-> It is essential for everyone to study English well.

3. The teacher let me go home early.

-> We are allowed to go home early by the teacher.

4. He spends twenty minutes driving to work every day.

-> It takes him twenty minutes to drive to work every day.

5. We got up early so that we could go to the theatre on time.

-> We got up early to go to the theatre on time.