will lengthen
Regular verb: lengthen - lengthened- lengthened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I will lengthen
you will lengthen
she will lengthen
we will lengthen
you will lengthen
they will lengthen 	I will be lengthening
you will be lengthening
she will be lengthening
we will be lengthening
you will be lengthening
they will be lengthening	I will have lengthened
you will have lengthened
she will have lengthened
we will have lengthened
you will have lengthened
they will have lengthened	I will have been lengthening
you will have been lengthening
she will have been lengthening
we will have been lengthening
you will have been lengthening
they will have been lengthening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I will not lengthen
you will not lengthen
she will not lengthen
we will not lengthen
you will not lengthen
they will not lengthen 	I will not be lengthening
you will not be lengthening
she will not be lengthening
we will not be lengthening
you will not be lengthening
they will not be lengthening	I will not have lengthened
you will not have lengthened
she will not have lengthened
we will not have lengthened
you will not have lengthened
they will not have lengthened	I will not have been lengthening
you will not have been lengthening
she will not have been lengthening
we will not have been lengthening
you will not have been lengthening
they will not have been lengthening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
will I lengthen?
will you lengthen?
will she lengthen?
will we lengthen?
will you lengthen?
will they lengthen? 	will I be lengthening?
will you be lengthening?
will she be lengthening?
will we be lengthening?
will you be lengthening?
will they be lengthening? 	will I have lengthened?
will you have lengthened?
will she have lengthened?
will we have lengthened?
will you have lengthened?
will they have lengthened? 	will I have been lengthening?
will you have been lengthening?
will she have been lengthening?
will we have been lengthening?
will you have been lengthening?
will they have been lengthening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
will I not lengthen?
will you not lengthen?
will she not lengthen?
will we not lengthen?
will you not lengthen?
will they not lengthen? 	will I not be lengthening?
will you not be lengthening?
will she not be lengthening?
will we not be lengthening?
will you not be lengthening?
will they not be lengthening? 	will I not have lengthened?
will you not have lengthened?
will she not have lengthened?
will we not have lengthened?
will you not have lengthened?
will they not have lengthened? 	will I not have been lengthening?
will you not have been lengthening?
will she not have been lengthening?
will we not have been lengthening?
will you not have been lengthening?
will they not have been lengthening?