I must fresh you must fresh he must fresh we must fresh you must fresh they must fresh
V-ing form
I must be freshing you must be freshing he must be freshing we must be freshing you must be freshing they must be freshing
Perfect
I must have freshed you must have freshed he must have freshed we must have freshed you must have freshed they must have freshed
V-ing perfect
I must have been freshing you must have been freshing he must have been freshing we must have been freshing you must have been freshing they must have been freshing
Negation
Simple form
I must not fresh you must not fresh he must not fresh we must not fresh you must not fresh they must not fresh
V-ing form
I must not be freshing you must not be freshing he must not be freshing we must not be freshing you must not be freshing they must not be freshing
Perfect
I must not have freshed you must not have freshed he must not have freshed we must not have freshed you must not have freshed they must not have freshed
V-ing perfect
I must not have been freshing you must not have been freshing he must not have been freshing we must not have been freshing you must not have been freshing they must not have been freshing
Interrogative form
Simple form
must I fresh? must you fresh? must he fresh? must we fresh? must you fresh? must they fresh?
V-ing form
must I be freshing? must you be freshing? must he be freshing? must we be freshing? must you be freshing? must they be freshing?
Perfect
must I have freshed? must you have freshed? must he have freshed? must we have freshed? must you have freshed? must they have freshed?
V-ing perfect
must I have been freshing? must you have been freshing? must he have been freshing? must we have been freshing? must you have been freshing? must they have been freshing?
Interro-negative form
Simple form
must I not fresh? must you not fresh? must he not fresh? must we not fresh? must you not fresh? must they not fresh?
V-ing form
must I not be freshing? must you not be freshing? must he not be freshing? must we not be freshing? must you not be freshing? must they not be freshing?
Perfect
must I not have freshed? must you not have freshed? must he not have freshed? must we not have freshed? must you not have freshed? must they not have freshed?
V-ing perfect
must I not have been freshing? must you not have been freshing? must he not have been freshing? must we not have been freshing? must you not have been freshing? must they not have been freshing?