English verb conjugation
SHALL LENGTHEN

Regular verb: lengthen - lengthened - lengthened

Affirmation

Simple form	V-ing form
I shall lengthen you shall lengthen he shall lengthen we shall lengthen you shall lengthen they shall lengthen	I shall be lengthening you shall be lengthening he shall be lengthening we shall be lengthening you shall be lengthening they shall be lengthening
Perfect	V-ing perfect
I shall have lengthened you shall have lengthened he shall have lengthened we shall have lengthened you shall have lengthened they shall have lengthened	I shall have been lengthening you shall have been lengthening he shall have been lengthening we shall have been lengthening you shall have been lengthening they shall have been lengthening

Negation

Simple form	V-ing form
I shall not lengthen you shall not lengthen he shall not lengthen we shall not lengthen you shall not lengthen they shall not lengthen	I shall not be lengthening you shall not be lengthening he shall not be lengthening we shall not be lengthening you shall not be lengthening they shall not be lengthening
Perfect	V-ing perfect
I shall not have lengthened you shall not have lengthened he shall not have lengthened we shall not have lengthened you shall not have lengthened they shall not have lengthened	I shall not have been lengthening you shall not have been lengthening he shall not have been lengthening we shall not have been lengthening you shall not have been lengthening they shall not have been lengthening

Interrogative form

Simple form	V-ing form
shall I lengthen? shall you lengthen? shall he lengthen? shall we lengthen? shall you lengthen? shall they lengthen?	shall I be lengthening? shall you be lengthening? shall he be lengthening? shall we be lengthening? shall you be lengthening? shall they be lengthening?
Perfect	V-ing perfect
shall I have lengthened? shall you have lengthened? shall he have lengthened? shall we have lengthened? shall you have lengthened? shall they have lengthened?	shall I have been lengthening? shall you have been lengthening? shall he have been lengthening? shall we have been lengthening? shall you have been lengthening? shall they have been lengthening?

Interro-negative form

Simple form	V-ing form
shall I not lengthen? shall you not lengthen? shall he not lengthen? shall we not lengthen? shall you not lengthen? shall they not lengthen?	shall I not be lengthening? shall you not be lengthening? shall he not be lengthening? shall we not be lengthening? shall you not be lengthening? shall they not be lengthening?
Perfect	V-ing perfect
shall I not have lengthened? shall you not have lengthened? shall he not have lengthened? shall we not have lengthened? shall you not have lengthened? shall they not have lengthened?	shall I not have been lengthening? shall you not have been lengthening? shall he not have been lengthening? shall we not have been lengthening? shall you not have been lengthening? shall they not have been lengthening?