shall heighten
Regular verb: heighten - heightened- heightened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall heighten
you shall heighten
he shall heighten
we shall heighten
you shall heighten
they shall heighten 	I shall be heightening
you shall be heightening
he shall be heightening
we shall be heightening
you shall be heightening
they shall be heightening	I shall have heightened
you shall have heightened
he shall have heightened
we shall have heightened
you shall have heightened
they shall have heightened	I shall have been heightening
you shall have been heightening
he shall have been heightening
we shall have been heightening
you shall have been heightening
they shall have been heightening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not heighten
you shall not heighten
he shall not heighten
we shall not heighten
you shall not heighten
they shall not heighten 	I shall not be heightening
you shall not be heightening
he shall not be heightening
we shall not be heightening
you shall not be heightening
they shall not be heightening	I shall not have heightened
you shall not have heightened
he shall not have heightened
we shall not have heightened
you shall not have heightened
they shall not have heightened	I shall not have been heightening
you shall not have been heightening
he shall not have been heightening
we shall not have been heightening
you shall not have been heightening
they shall not have been heightening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I heighten?
shall you heighten?
shall he heighten?
shall we heighten?
shall you heighten?
shall they heighten? 	shall I be heightening?
shall you be heightening?
shall he be heightening?
shall we be heightening?
shall you be heightening?
shall they be heightening? 	shall I have heightened?
shall you have heightened?
shall he have heightened?
shall we have heightened?
shall you have heightened?
shall they have heightened? 	shall I have been heightening?
shall you have been heightening?
shall he have been heightening?
shall we have been heightening?
shall you have been heightening?
shall they have been heightening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not heighten?
shall you not heighten?
shall he not heighten?
shall we not heighten?
shall you not heighten?
shall they not heighten? 	shall I not be heightening?
shall you not be heightening?
shall he not be heightening?
shall we not be heightening?
shall you not be heightening?
shall they not be heightening? 	shall I not have heightened?
shall you not have heightened?
shall he not have heightened?
shall we not have heightened?
shall you not have heightened?
shall they not have heightened? 	shall I not have been heightening?
shall you not have been heightening?
shall he not have been heightening?
shall we not have been heightening?
shall you not have been heightening?
shall they not have been heightening?