I must cap you must cap he must cap we must cap you must cap they must cap
V-ing form
I must be capping you must be capping he must be capping we must be capping you must be capping they must be capping
Perfect
I must have capped you must have capped he must have capped we must have capped you must have capped they must have capped
V-ing perfect
I must have been capping you must have been capping he must have been capping we must have been capping you must have been capping they must have been capping
Negation
Simple form
I must not cap you must not cap he must not cap we must not cap you must not cap they must not cap
V-ing form
I must not be capping you must not be capping he must not be capping we must not be capping you must not be capping they must not be capping
Perfect
I must not have capped you must not have capped he must not have capped we must not have capped you must not have capped they must not have capped
V-ing perfect
I must not have been capping you must not have been capping he must not have been capping we must not have been capping you must not have been capping they must not have been capping
Interrogative form
Simple form
must I cap? must you cap? must he cap? must we cap? must you cap? must they cap?
V-ing form
must I be capping? must you be capping? must he be capping? must we be capping? must you be capping? must they be capping?
Perfect
must I have capped? must you have capped? must he have capped? must we have capped? must you have capped? must they have capped?
V-ing perfect
must I have been capping? must you have been capping? must he have been capping? must we have been capping? must you have been capping? must they have been capping?
Interro-negative form
Simple form
must I not cap? must you not cap? must he not cap? must we not cap? must you not cap? must they not cap?
V-ing form
must I not be capping? must you not be capping? must he not be capping? must we not be capping? must you not be capping? must they not be capping?
Perfect
must I not have capped? must you not have capped? must he not have capped? must we not have capped? must you not have capped? must they not have capped?
V-ing perfect
must I not have been capping? must you not have been capping? must he not have been capping? must we not have been capping? must you not have been capping? must they not have been capping?