can heighten
Verbo regular: heighten - heightened- heightened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can heighten
you can heighten
he can heighten
we can heighten
you can heighten
they can heighten 	I can be heightening
you can be heightening
he can be heightening
we can be heightening
you can be heightening
they can be heightening	I can have heightened
you can have heightened
he can have heightened
we can have heightened
you can have heightened
they can have heightened	I can have been heightening
you can have been heightening
he can have been heightening
we can have been heightening
you can have been heightening
they can have been heightening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot heighten
you cannot heighten
he cannot heighten
we cannot heighten
you cannot heighten
they cannot heighten 	I cannot be heightening
you cannot be heightening
he cannot be heightening
we cannot be heightening
you cannot be heightening
they cannot be heightening	I cannot have heightened
you cannot have heightened
he cannot have heightened
we cannot have heightened
you cannot have heightened
they cannot have heightened	I cannot have been heightening
you cannot have been heightening
he cannot have been heightening
we cannot have been heightening
you cannot have been heightening
they cannot have been heightening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I heighten?
can you heighten?
can he heighten?
can we heighten?
can you heighten?
can they heighten? 	can I be heightening?
can you be heightening?
can he be heightening?
can we be heightening?
can you be heightening?
can they be heightening? 	can I have heightened?
can you have heightened?
can he have heightened?
can we have heightened?
can you have heightened?
can they have heightened? 	can I have been heightening?
can you have been heightening?
can he have been heightening?
can we have been heightening?
can you have been heightening?
can they have been heightening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not heighten?
can you not heighten?
can he not heighten?
can we not heighten?
can you not heighten?
can they not heighten? 	can I not be heightening?
can you not be heightening?
can he not be heightening?
can we not be heightening?
can you not be heightening?
can they not be heightening? 	can I not have heightened?
can you not have heightened?
can he not have heightened?
can we not have heightened?
can you not have heightened?
can they not have heightened? 	can I not have been heightening?
can you not have been heightening?
can he not have been heightening?
can we not have been heightening?
can you not have been heightening?
can they not have been heightening?