should understudy
Verbo regular: understudy - understudied- understudied

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should understudy
you should understudy
he should understudy
we should understudy
you should understudy
they should understudy 	I should be understudying
you should be understudying
he should be understudying
we should be understudying
you should be understudying
they should be understudying	I should have understudied
you should have understudied
he should have understudied
we should have understudied
you should have understudied
they should have understudied	I should have been understudying
you should have been understudying
he should have been understudying
we should have been understudying
you should have been understudying
they should have been understudying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not understudy
you should not understudy
he should not understudy
we should not understudy
you should not understudy
they should not understudy 	I should not be understudying
you should not be understudying
he should not be understudying
we should not be understudying
you should not be understudying
they should not be understudying	I should not have understudied
you should not have understudied
he should not have understudied
we should not have understudied
you should not have understudied
they should not have understudied	I should not have been understudying
you should not have been understudying
he should not have been understudying
we should not have been understudying
you should not have been understudying
they should not have been understudying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I understudy?
should you understudy?
should he understudy?
should we understudy?
should you understudy?
should they understudy? 	should I be understudying?
should you be understudying?
should he be understudying?
should we be understudying?
should you be understudying?
should they be understudying? 	should I have understudied?
should you have understudied?
should he have understudied?
should we have understudied?
should you have understudied?
should they have understudied? 	should I have been understudying?
should you have been understudying?
should he have been understudying?
should we have been understudying?
should you have been understudying?
should they have been understudying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not understudy?
should you not understudy?
should he not understudy?
should we not understudy?
should you not understudy?
should they not understudy? 	should I not be understudying?
should you not be understudying?
should he not be understudying?
should we not be understudying?
should you not be understudying?
should they not be understudying? 	should I not have understudied?
should you not have understudied?
should he not have understudied?
should we not have understudied?
should you not have understudied?
should they not have understudied? 	should I not have been understudying?
should you not have been understudying?
should he not have been understudying?
should we not have been understudying?
should you not have been understudying?
should they not have been understudying?