should flatten
Verbo regular: flatten - flattened- flattened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should flatten
you should flatten
she should flatten
we should flatten
you should flatten
they should flatten 	I should be flattening
you should be flattening
she should be flattening
we should be flattening
you should be flattening
they should be flattening	I should have flattened
you should have flattened
she should have flattened
we should have flattened
you should have flattened
they should have flattened	I should have been flattening
you should have been flattening
she should have been flattening
we should have been flattening
you should have been flattening
they should have been flattening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not flatten
you should not flatten
she should not flatten
we should not flatten
you should not flatten
they should not flatten 	I should not be flattening
you should not be flattening
she should not be flattening
we should not be flattening
you should not be flattening
they should not be flattening	I should not have flattened
you should not have flattened
she should not have flattened
we should not have flattened
you should not have flattened
they should not have flattened	I should not have been flattening
you should not have been flattening
she should not have been flattening
we should not have been flattening
you should not have been flattening
they should not have been flattening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I flatten?
should you flatten?
should she flatten?
should we flatten?
should you flatten?
should they flatten? 	should I be flattening?
should you be flattening?
should she be flattening?
should we be flattening?
should you be flattening?
should they be flattening? 	should I have flattened?
should you have flattened?
should she have flattened?
should we have flattened?
should you have flattened?
should they have flattened? 	should I have been flattening?
should you have been flattening?
should she have been flattening?
should we have been flattening?
should you have been flattening?
should they have been flattening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not flatten?
should you not flatten?
should she not flatten?
should we not flatten?
should you not flatten?
should they not flatten? 	should I not be flattening?
should you not be flattening?
should she not be flattening?
should we not be flattening?
should you not be flattening?
should they not be flattening? 	should I not have flattened?
should you not have flattened?
should she not have flattened?
should we not have flattened?
should you not have flattened?
should they not have flattened? 	should I not have been flattening?
should you not have been flattening?
should she not have been flattening?
should we not have been flattening?
should you not have been flattening?
should they not have been flattening?