Unit 7 - Grammar 4ESO
Modal verbs
Possibility: may /might - I may go to the doctor later, I have a strong stomachache.
Permission: may - May I go to the bathroom?
To express ability and possibility:
can (present) - I can play the piano. / Also for permission: Can I go to the bathroom?
could (past) - I could read when I was three years old.
be able to (present / past / future) - I am able to arrive on time.
- I was able to arrive on time.
- I will be able to arrive on time.
Remember: can = be able to because they both express ability and possibility.