should center
Verbo regular: center - centered- centered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should center
you should center
he should center
we should center
you should center
they should center 	I should be centering
you should be centering
he should be centering
we should be centering
you should be centering
they should be centering	I should have centered
you should have centered
he should have centered
we should have centered
you should have centered
they should have centered	I should have been centering
you should have been centering
he should have been centering
we should have been centering
you should have been centering
they should have been centering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not center
you should not center
he should not center
we should not center
you should not center
they should not center 	I should not be centering
you should not be centering
he should not be centering
we should not be centering
you should not be centering
they should not be centering	I should not have centered
you should not have centered
he should not have centered
we should not have centered
you should not have centered
they should not have centered	I should not have been centering
you should not have been centering
he should not have been centering
we should not have been centering
you should not have been centering
they should not have been centering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I center?
should you center?
should he center?
should we center?
should you center?
should they center? 	should I be centering?
should you be centering?
should he be centering?
should we be centering?
should you be centering?
should they be centering? 	should I have centered?
should you have centered?
should he have centered?
should we have centered?
should you have centered?
should they have centered? 	should I have been centering?
should you have been centering?
should he have been centering?
should we have been centering?
should you have been centering?
should they have been centering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not center?
should you not center?
should he not center?
should we not center?
should you not center?
should they not center? 	should I not be centering?
should you not be centering?
should he not be centering?
should we not be centering?
should you not be centering?
should they not be centering? 	should I not have centered?
should you not have centered?
should he not have centered?
should we not have centered?
should you not have centered?
should they not have centered? 	should I not have been centering?
should you not have been centering?
should he not have been centering?
should we not have been centering?
should you not have been centering?
should they not have been centering?