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