MODAL VERBS

1. CAN/

1.1. COULD

1.1.1. I CAN PLAY THE PIANO

2. MAY/

2.1. MIGHT

2.1.1. HE MIGHT HAVE GOT STUCK IN TRAFFIC

3. SHALL

3.1. SHOULD

3.1.1. You should not drink twenty cups of coffe a day

4. WOULD/

4.1. WILL

4.1.1. I WOULD HAVE GONE TO THE PARTY, BUT I WAS REALLY BUSY

5. MUST/

5.1. HAVE TO

5.1.1. we have to pay our rent on the firts of the month