Present and future
Obligation and strong advice: you must wear a seatbelt. Also a deduction: you must be tired.
- I / you / he / she / it / we / they must
Must
devoir
Modal verb.
Modal verb
Must has no past: for an obligation in the past, English uses had to: I had to leave. Must have and a participle is a deduction: you must have been tired.
Newbie
Enough to talk about now, the past, and your plans, and to give instructions.