I must go
I must leave
ADJ.
careful, known, live, tired, wrong
You must be careful with that knife or you'll cut yourself.
VERB + MUST
borrow, felt, fermenting, handle, map, think, told
I felt I must borrow some money from my parents to pay for the car repair.
MUST + NOUN
advantage, class, friends, grammar, o'erflows, room, something
You must have friends who understand what you're going through in difficult times.
PREP.
about, in, in, off, on, up, upon
There's a lot of dust about the old attic that we must clean up before winter.
ADV.
fully
You must fully understand the contract before you sign it.