will understudy
Regular verb: understudy - understudied- understudied

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I will not understudy
you will not understudy
he will not understudy
we will not understudy
you will not understudy
they will not understudy 	I will not be understudying
you will not be understudying
he will not be understudying
we will not be understudying
you will not be understudying
they will not be understudying	I will not have understudied
you will not have understudied
he will not have understudied
we will not have understudied
you will not have understudied
they will not have understudied	I will not have been understudying
you will not have been understudying
he will not have been understudying
we will not have been understudying
you will not have been understudying
they will not have been understudying	

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

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