Modals

Modals are a special kind of auxiliary (helping) verb. We use modals to express things such as

• future time (will)
• ability (can, could)
• possibility (may, might, could)
• necessity (must)
• advice (should)

The main verb after the modal must be in the simple (root) form. Never use a gerund (Ving) or infinitive (to V) after a modal!