Learn English Grammar: Lesson 19 (Part 2) – Modals 1. Modals of Possibility and Probability may    might     could    should   ought to    must    will     be going to Modals of possibility and probability indicate degrees, from a chance or possibility (50%) to definite (100%): MAY / MIGHT / COULD 50% possibility … Continue reading Learn English Grammar: Lesson 19 (Part 2) – Modals