use of must

use of (Must)

Must का प्रयोग ........... करने के लिये किआ जाता है

Must is used to talk about necessity .

I,  we, you, they or plural	He, she, it or singular
Must you +Act v1?	Must he +Act v1?
I must +Act v1.	He must +Act v1.
I must not +Act v1.	He must not +Act v1.