I must cable you must cable he must cable we must cable you must cable they must cable
V-ing form
I must be cabling you must be cabling he must be cabling we must be cabling you must be cabling they must be cabling
Perfect
I must have cabled you must have cabled he must have cabled we must have cabled you must have cabled they must have cabled
V-ing perfect
I must have been cabling you must have been cabling he must have been cabling we must have been cabling you must have been cabling they must have been cabling
Negation
Simple form
I must not cable you must not cable he must not cable we must not cable you must not cable they must not cable
V-ing form
I must not be cabling you must not be cabling he must not be cabling we must not be cabling you must not be cabling they must not be cabling
Perfect
I must not have cabled you must not have cabled he must not have cabled we must not have cabled you must not have cabled they must not have cabled
V-ing perfect
I must not have been cabling you must not have been cabling he must not have been cabling we must not have been cabling you must not have been cabling they must not have been cabling
Interrogative form
Simple form
must I cable? must you cable? must he cable? must we cable? must you cable? must they cable?
V-ing form
must I be cabling? must you be cabling? must he be cabling? must we be cabling? must you be cabling? must they be cabling?
Perfect
must I have cabled? must you have cabled? must he have cabled? must we have cabled? must you have cabled? must they have cabled?
V-ing perfect
must I have been cabling? must you have been cabling? must he have been cabling? must we have been cabling? must you have been cabling? must they have been cabling?
Interro-negative form
Simple form
must I not cable? must you not cable? must he not cable? must we not cable? must you not cable? must they not cable?
V-ing form
must I not be cabling? must you not be cabling? must he not be cabling? must we not be cabling? must you not be cabling? must they not be cabling?
Perfect
must I not have cabled? must you not have cabled? must he not have cabled? must we not have cabled? must you not have cabled? must they not have cabled?
V-ing perfect
must I not have been cabling? must you not have been cabling? must he not have been cabling? must we not have been cabling? must you not have been cabling? must they not have been cabling?