shall underachieve
Regular verb: underachieve - underachieved- underachieved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll underachieve
you'll underachieve
he'll underachieve
we'll underachieve
you'll underachieve
they'll underachieve 	I'll be underachieving
you'll be underachieving
he'll be underachieving
we'll be underachieving
you'll be underachieving
they'll be underachieving	I'll have underachieved
you'll have underachieved
he'll have underachieved
we'll have underachieved
you'll have underachieved
they'll have underachieved	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 	V-ing form 	Perfect 	V-ing perfect 	
I shan't underachieve
you shan't underachieve
he shan't underachieve
we shan't underachieve
you shan't underachieve
they shan't underachieve 	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	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	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 	V-ing form 	Perfect 	V-ing perfect 	
shall I underachieve?
shall you underachieve?
shall he underachieve?
shall we underachieve?
shall you underachieve?
shall they underachieve? 	shall I be underachieving?
shall you be underachieving?
shall he be underachieving?
shall we be underachieving?
shall you be underachieving?
shall they be underachieving? 	shall I have underachieved?
shall you have underachieved?
shall he have underachieved?
shall we have underachieved?
shall you have underachieved?
shall they have underachieved? 	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 	V-ing form 	Perfect 	V-ing perfect 	
shan't I underachieve?
shan't you underachieve?
shan't he underachieve?
shan't we underachieve?
shan't you underachieve?
shan't they underachieve? 	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? 	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? 	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?