English Grammar
Possibility & Deduction
must / might / may / could / can't + base verb
These modals form a certainty spectrum. "It must be true" (almost certain), "it might be him" (possible), "she can't be right" (almost impossible). The same verbs that express ability and obligation also express how certain we are — context tells us which.
Real Examples from Native Speakers
"I think this could be it, actually."
Host Tries To Spot A Man Wearing A Wig
How it works
Formula
must / might / may / could / can't + base verb
This page combines the textbook rule with real-world English — every example is an unscripted clip from a real native speaker. You're hearing how this grammar point sounds in real life, not in a classroom.