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