Past Modals of Deduction

You see an elephant painting a picture. How can this have happened?

You see a woman eating a turkey on the underground train! What might have happened?

Make a sentence with "must have"

You lose your wallet, and find it later with no money in it. What could have happened?

Your brother comes home looking miserable. What could have happened?

You see a broken window, and a man with a brick. What must he have done?

Make a sentence with "can´t have"

Your friend says that they are now a millionaire. What could have happened?

You see a boy who is very wet even though it is a sunny day. What could have happened?

A dog is walking on only two legs! How could this have happened?

Make a sentence with "may have"

Make a sentence with "could have"

You see a girl crying and there is an ice-cream on the floor. What must have happened?