Why are the examples wrong?
Match the items on the right by dragging them to the items on the left
I must go soon
That can't be her mother. She's too young.
This needs to be kept dry
Will you answer the door, please?
They might arrive late, who knows?
You should drive more carefully
It should work now
Couldn't you find it?
Could I have your name please?
You don't have to come if you don't want to
non-obligation
ability
necessity
willingness
permission
obligation
speculation
likelihood
impossibility
advice