must defoliate
Regular verb: defoliate - defoliated- defoliated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must defoliate
you must defoliate
she must defoliate
we must defoliate
you must defoliate
they must defoliate 	I must be defoliating
you must be defoliating
she must be defoliating
we must be defoliating
you must be defoliating
they must be defoliating	I must have defoliated
you must have defoliated
she must have defoliated
we must have defoliated
you must have defoliated
they must have defoliated	I must have been defoliating
you must have been defoliating
she must have been defoliating
we must have been defoliating
you must have been defoliating
they must have been defoliating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not defoliate
you must not defoliate
she must not defoliate
we must not defoliate
you must not defoliate
they must not defoliate 	I must not be defoliating
you must not be defoliating
she must not be defoliating
we must not be defoliating
you must not be defoliating
they must not be defoliating	I must not have defoliated
you must not have defoliated
she must not have defoliated
we must not have defoliated
you must not have defoliated
they must not have defoliated	I must not have been defoliating
you must not have been defoliating
she must not have been defoliating
we must not have been defoliating
you must not have been defoliating
they must not have been defoliating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I defoliate?
must you defoliate?
must she defoliate?
must we defoliate?
must you defoliate?
must they defoliate? 	must I be defoliating?
must you be defoliating?
must she be defoliating?
must we be defoliating?
must you be defoliating?
must they be defoliating? 	must I have defoliated?
must you have defoliated?
must she have defoliated?
must we have defoliated?
must you have defoliated?
must they have defoliated? 	must I have been defoliating?
must you have been defoliating?
must she have been defoliating?
must we have been defoliating?
must you have been defoliating?
must they have been defoliating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not defoliate?
must you not defoliate?
must she not defoliate?
must we not defoliate?
must you not defoliate?
must they not defoliate? 	must I not be defoliating?
must you not be defoliating?
must she not be defoliating?
must we not be defoliating?
must you not be defoliating?
must they not be defoliating? 	must I not have defoliated?
must you not have defoliated?
must she not have defoliated?
must we not have defoliated?
must you not have defoliated?
must they not have defoliated? 	must I not have been defoliating?
must you not have been defoliating?
must she not have been defoliating?
must we not have been defoliating?
must you not have been defoliating?
must they not have been defoliating?