1.The driver threw a box out of the window and I saw this. -> I saw 2. They permitted me to enter this area -> They let 3. Their parents told him to stop playing football. -> Their parents made 4. I wish i hadn't sold my bike -> I regret 5. The doctors succeeded. They save the drive's life, -> The doctors succeeded 6. The car is too expensive for him to buy. -> he Can't afford

1. I saw the driver throw a box out of the window.

2. They let me enter this area.

3. Their parents made him stop playing football.

4. I regret selling my bike.

5. The doctors suceeded in saving the driver's life.

6. He can't afford to buy the car because it's too expensive.

=>
1. I saw the driver throw a box out of the window. 
2. They let me enter this area. 
3. Their parents made him stop playing football. 
4. I regret selling my bike. 
5. The doctors succeeded in saving the driver's life. 
6. He can't afford to buy the car because it is too expensive.