must

modal verb
A1
OPAL
1
A1
used to say that something is necessary or very important (sometimes involving a rule or a law)
باید, ضروری است, لازم است
2
B1
used to say that something is likely or logical
می‌بایست, باید
You must be hungry after all that walking.
He must have known what she wanted.
I'm sorry, she's not here. She must have left already .
3
B1
used to recommend that somebody does something because you think it is a good idea
باید, لازم است, می‌بایست
You simply must read this book.
We must get together soon for lunch.
noun
1
something that you must do, see, buy, etc.
ضروری, واجب, لازم, اجباری