Lesson 4A: CAN - COULD - TO BE ABLE TO

In this lesson we are working with this modal form when it means ability and possibility (and it's also used for permission). Apart form the exercises on the book and workbook here you can do some more:

• exercise 1      exercise 2     exercise 3      exercise 4

If you want to know what is the difference between CAN and  TO BE ABLE TO you can go to this link