Modal

Question 0

Could - May - Might

Answer 0

This is a possibility

We could leave after 2:30.

Question 1

Can

Answer 1

This is within our ability

We can leave after 2:30.

Question 2

Had better - ought to - should

Answer 2

This is advisable

We had better leave after 2:30.

Question 3

Have to - must

Answer 3

This is a necessity

We have to leave in the morning.

Question 4

Will - shall

Answer 4

This is our intention

We will leave in the morning.

Question 5

Would

Answer 5

This is a past habit.

We would leave every morning at 8:30.

Question 6

Must - must have

Answer 6

This is an assumption. (Concerning a past action)

The woman must be the new president.

I’m lost. I must have taken a wrong turn.

Question 7

Can’t - couldn’t have

Answer 7

This seems like an impossibility.

You can’t be hungry - you just ate.
He couldn’t have taken the book. I had it with me.