I'll be certifying you'll be certifying he'll be certifying we'll be certifying you'll be certifying they'll be certifying
Perfect
I'll have certified you'll have certified he'll have certified we'll have certified you'll have certified they'll have certified
V-ing perfect
I'll have been certifying you'll have been certifying he'll have been certifying we'll have been certifying you'll have been certifying they'll have been certifying
Negation
Simple form
I shan't certify you shan't certify he shan't certify we shan't certify you shan't certify they shan't certify
V-ing form
I shan't be certifying you shan't be certifying he shan't be certifying we shan't be certifying you shan't be certifying they shan't be certifying
Perfect
I shan't have certified you shan't have certified he shan't have certified we shan't have certified you shan't have certified they shan't have certified
V-ing perfect
I shan't have been certifying you shan't have been certifying he shan't have been certifying we shan't have been certifying you shan't have been certifying they shan't have been certifying
Interrogative form
Simple form
shall I certify? shall you certify? shall he certify? shall we certify? shall you certify? shall they certify?
V-ing form
shall I be certifying? shall you be certifying? shall he be certifying? shall we be certifying? shall you be certifying? shall they be certifying?
Perfect
shall I have certified? shall you have certified? shall he have certified? shall we have certified? shall you have certified? shall they have certified?
V-ing perfect
shall I have been certifying? shall you have been certifying? shall he have been certifying? shall we have been certifying? shall you have been certifying? shall they have been certifying?
Interro-negative form
Simple form
shan't I certify? shan't you certify? shan't he certify? shan't we certify? shan't you certify? shan't they certify?
V-ing form
shan't I be certifying? shan't you be certifying? shan't he be certifying? shan't we be certifying? shan't you be certifying? shan't they be certifying?
Perfect
shan't I have certified? shan't you have certified? shan't he have certified? shan't we have certified? shan't you have certified? shan't they have certified?
V-ing perfect
shan't I have been certifying? shan't you have been certifying? shan't he have been certifying? shan't we have been certifying? shan't you have been certifying? shan't they have been certifying?