can flatten
Verbo regular: flatten - flattened- flattened

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot flatten
you cannot flatten
he cannot flatten
we cannot flatten
you cannot flatten
they cannot flatten 	I cannot be flattening
you cannot be flattening
he cannot be flattening
we cannot be flattening
you cannot be flattening
they cannot be flattening	I cannot have flattened
you cannot have flattened
he cannot have flattened
we cannot have flattened
you cannot have flattened
they cannot have flattened	I cannot have been flattening
you cannot have been flattening
he cannot have been flattening
we cannot have been flattening
you cannot have been flattening
they cannot have been flattening	

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

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