I must set you must set she must set we must set you must set they must set
V-ing form
I must be setting you must be setting she must be setting we must be setting you must be setting they must be setting
Perfect
I must have set you must have set she must have set we must have set you must have set they must have set
V-ing perfect
I must have been setting you must have been setting she must have been setting we must have been setting you must have been setting they must have been setting
Negation
Simple form
I must not set you must not set she must not set we must not set you must not set they must not set
V-ing form
I must not be setting you must not be setting she must not be setting we must not be setting you must not be setting they must not be setting
Perfect
I must not have set you must not have set she must not have set we must not have set you must not have set they must not have set
V-ing perfect
I must not have been setting you must not have been setting she must not have been setting we must not have been setting you must not have been setting they must not have been setting
Interrogative form
Simple form
must I set? must you set? must she set? must we set? must you set? must they set?
V-ing form
must I be setting? must you be setting? must she be setting? must we be setting? must you be setting? must they be setting?
Perfect
must I have set? must you have set? must she have set? must we have set? must you have set? must they have set?
V-ing perfect
must I have been setting? must you have been setting? must she have been setting? must we have been setting? must you have been setting? must they have been setting?
Interro-negative form
Simple form
must I not set? must you not set? must she not set? must we not set? must you not set? must they not set?
V-ing form
must I not be setting? must you not be setting? must she not be setting? must we not be setting? must you not be setting? must they not be setting?
Perfect
must I not have set? must you not have set? must she not have set? must we not have set? must you not have set? must they not have set?
V-ing perfect
must I not have been setting? must you not have been setting? must she not have been setting? must we not have been setting? must you not have been setting? must they not have been setting?