shall understudy
Regular verb: understudy - understudied- understudied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll understudy
you'll understudy
he'll understudy
we'll understudy
you'll understudy
they'll understudy 	I'll be understudying
you'll be understudying
he'll be understudying
we'll be understudying
you'll be understudying
they'll be understudying	I'll have understudied
you'll have understudied
he'll have understudied
we'll have understudied
you'll have understudied
they'll have understudied	I'll have been understudying
you'll have been understudying
he'll have been understudying
we'll have been understudying
you'll have been understudying
they'll have been understudying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't understudy
you shan't understudy
he shan't understudy
we shan't understudy
you shan't understudy
they shan't understudy 	I shan't be understudying
you shan't be understudying
he shan't be understudying
we shan't be understudying
you shan't be understudying
they shan't be understudying	I shan't have understudied
you shan't have understudied
he shan't have understudied
we shan't have understudied
you shan't have understudied
they shan't have understudied	I shan't have been understudying
you shan't have been understudying
he shan't have been understudying
we shan't have been understudying
you shan't have been understudying
they shan't have been understudying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I understudy?
shall you understudy?
shall he understudy?
shall we understudy?
shall you understudy?
shall they understudy? 	shall I be understudying?
shall you be understudying?
shall he be understudying?
shall we be understudying?
shall you be understudying?
shall they be understudying? 	shall I have understudied?
shall you have understudied?
shall he have understudied?
shall we have understudied?
shall you have understudied?
shall they have understudied? 	shall I have been understudying?
shall you have been understudying?
shall he have been understudying?
shall we have been understudying?
shall you have been understudying?
shall they have been understudying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I understudy?
shan't you understudy?
shan't he understudy?
shan't we understudy?
shan't you understudy?
shan't they understudy? 	shan't I be understudying?
shan't you be understudying?
shan't he be understudying?
shan't we be understudying?
shan't you be understudying?
shan't they be understudying? 	shan't I have understudied?
shan't you have understudied?
shan't he have understudied?
shan't we have understudied?
shan't you have understudied?
shan't they have understudied? 	shan't I have been understudying?
shan't you have been understudying?
shan't he have been understudying?
shan't we have been understudying?
shan't you have been understudying?
shan't they have been understudying?