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