English verb conjugation
MAY LENGTHEN

Regular verb: lengthen - lengthened - lengthened

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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