1. Unit 3C: If at first you don´t succeed...

2. Can CAN Different uses:
Abilities or capacities (to know or to be able to).
Mary can swim very fast.
Request, ask or give permission
Can you call me tonight ?
Possibility
I can meet you later.
It can also be used for suggestions.
You can eat ravioli if you like pasta.

3. Could It is the past of can and it is used to express:
Ability or capacity in the past
She could run fast when she was a child
Polite request
Could you help me with these suitcases?
Polite suggestion
You could exercise and eat healthier food
Possibility –less probable than with can-
Mark could join us in the cinema.

4. Be able to DIFFERENCE CAN and BE ABLE TO (in the past)
It expresses abilities like can and it is used in all the verbal tenses where can is not used.
I was able to finish my homework on time
DIFFERENCE CAN and
BE ABLE TO (in the past)
In a (+) past simple sentence, if we refer to something difficult that someone succeeded in doing on a specific occasion , we use be able to (or managed to)
Although the space was very small, he was able to (or managed to) park there.
IN THIS CONTEXT, COULD IS NOT POSSIBLE

5. END OF THE PRESENTATION
Please now work on the exercises you will find on page 135