Modals of deduction

Match the modal MUST with its function

• To express 50% of certainty

• To express 100% of certainty

• Information that is impossible or not true

• To express obligation

Match the modal CAN´T with its function

• 50% certain of the information

• 100% sure of the information

• Information that is impossible or not true

• maybe certain

Match the modal MIGHT/MAY with its function

• Not true or impossible

• 100% Completely certain

• 50% - Maybe certain

He _____ be a homeless people. He looks really fancy.

• must

• can´t

• may

He _____ be carrying a lot of money in his briefcase.

• can´t

• might

• may

He _____ be going to his office, because he is wearing a suit.

• must

• can´t

• must not

She ____ be a model, I´m not sure.

• can´t

• might

• may

She _____ be unhappy, she is smiling.

• might

• might not

• can´t

She ______ be a teacher, because of her formal clothes.

• might

• may

• could

• can´t

He ____ be presenting his PIA today, because he is wearing jeans.

• may

• must

• can´t