should mark
Verbo regular: mark - marked- marked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I'd mark
you'd mark
he'd mark
we'd mark
you'd mark
they'd mark 	I'd be marking
you'd be marking
he'd be marking
we'd be marking
you'd be marking
they'd be marking	I should've marked
you should've marked
he should've marked
we should've marked
you should've marked
they should've marked	I should've been marking
you should've been marking
he should've been marking
we should've been marking
you should've been marking
they should've been marking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shouldn't mark
you shouldn't mark
he shouldn't mark
we shouldn't mark
you shouldn't mark
they shouldn't mark 	I shouldn't be marking
you shouldn't be marking
he shouldn't be marking
we shouldn't be marking
you shouldn't be marking
they shouldn't be marking	I shouldn't have marked
you shouldn't have marked
he shouldn't have marked
we shouldn't have marked
you shouldn't have marked
they shouldn't have marked	I shouldn't have been marking
you shouldn't have been marking
he shouldn't have been marking
we shouldn't have been marking
you shouldn't have been marking
they shouldn't have been marking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I mark?
should you mark?
should he mark?
should we mark?
should you mark?
should they mark? 	should I be marking?
should you be marking?
should he be marking?
should we be marking?
should you be marking?
should they be marking? 	should I have marked?
should you have marked?
should he have marked?
should we have marked?
should you have marked?
should they have marked? 	should I have been marking?
should you have been marking?
should he have been marking?
should we have been marking?
should you have been marking?
should they have been marking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shouldn't I mark?
shouldn't you mark?
shouldn't he mark?
shouldn't we mark?
shouldn't you mark?
shouldn't they mark? 	shouldn't I be marking?
shouldn't you be marking?
shouldn't he be marking?
shouldn't we be marking?
shouldn't you be marking?
shouldn't they be marking? 	shouldn't I have marked?
shouldn't you have marked?
shouldn't he have marked?
shouldn't we have marked?
shouldn't you have marked?
shouldn't they have marked? 	shouldn't I have been marking?
shouldn't you have been marking?
shouldn't he have been marking?
shouldn't we have been marking?
shouldn't you have been marking?
shouldn't they have been marking?