shall lessen
Regular verb: lessen - lessened- lessened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll lessen
you'll lessen
she'll lessen
we'll lessen
you'll lessen
they'll lessen 	I'll be lessening
you'll be lessening
she'll be lessening
we'll be lessening
you'll be lessening
they'll be lessening	I'll have lessened
you'll have lessened
she'll have lessened
we'll have lessened
you'll have lessened
they'll have lessened	I'll have been lessening
you'll have been lessening
she'll have been lessening
we'll have been lessening
you'll have been lessening
they'll have been lessening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't lessen
you shan't lessen
she shan't lessen
we shan't lessen
you shan't lessen
they shan't lessen 	I shan't be lessening
you shan't be lessening
she shan't be lessening
we shan't be lessening
you shan't be lessening
they shan't be lessening	I shan't have lessened
you shan't have lessened
she shan't have lessened
we shan't have lessened
you shan't have lessened
they shan't have lessened	I shan't have been lessening
you shan't have been lessening
she shan't have been lessening
we shan't have been lessening
you shan't have been lessening
they shan't have been lessening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I lessen?
shall you lessen?
shall she lessen?
shall we lessen?
shall you lessen?
shall they lessen? 	shall I be lessening?
shall you be lessening?
shall she be lessening?
shall we be lessening?
shall you be lessening?
shall they be lessening? 	shall I have lessened?
shall you have lessened?
shall she have lessened?
shall we have lessened?
shall you have lessened?
shall they have lessened? 	shall I have been lessening?
shall you have been lessening?
shall she have been lessening?
shall we have been lessening?
shall you have been lessening?
shall they have been lessening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I lessen?
shan't you lessen?
shan't she lessen?
shan't we lessen?
shan't you lessen?
shan't they lessen? 	shan't I be lessening?
shan't you be lessening?
shan't she be lessening?
shan't we be lessening?
shan't you be lessening?
shan't they be lessening? 	shan't I have lessened?
shan't you have lessened?
shan't she have lessened?
shan't we have lessened?
shan't you have lessened?
shan't they have lessened? 	shan't I have been lessening?
shan't you have been lessening?
shan't she have been lessening?
shan't we have been lessening?
shan't you have been lessening?
shan't they have been lessening?