must permeate
Regular verb: permeate - permeated- permeated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must permeate
you must permeate
she must permeate
we must permeate
you must permeate
they must permeate 	I must be permeating
you must be permeating
she must be permeating
we must be permeating
you must be permeating
they must be permeating	I must have permeated
you must have permeated
she must have permeated
we must have permeated
you must have permeated
they must have permeated	I must have been permeating
you must have been permeating
she must have been permeating
we must have been permeating
you must have been permeating
they must have been permeating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not permeate
you must not permeate
she must not permeate
we must not permeate
you must not permeate
they must not permeate 	I must not be permeating
you must not be permeating
she must not be permeating
we must not be permeating
you must not be permeating
they must not be permeating	I must not have permeated
you must not have permeated
she must not have permeated
we must not have permeated
you must not have permeated
they must not have permeated	I must not have been permeating
you must not have been permeating
she must not have been permeating
we must not have been permeating
you must not have been permeating
they must not have been permeating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I permeate?
must you permeate?
must she permeate?
must we permeate?
must you permeate?
must they permeate? 	must I be permeating?
must you be permeating?
must she be permeating?
must we be permeating?
must you be permeating?
must they be permeating? 	must I have permeated?
must you have permeated?
must she have permeated?
must we have permeated?
must you have permeated?
must they have permeated? 	must I have been permeating?
must you have been permeating?
must she have been permeating?
must we have been permeating?
must you have been permeating?
must they have been permeating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not permeate?
must you not permeate?
must she not permeate?
must we not permeate?
must you not permeate?
must they not permeate? 	must I not be permeating?
must you not be permeating?
must she not be permeating?
must we not be permeating?
must you not be permeating?
must they not be permeating? 	must I not have permeated?
must you not have permeated?
must she not have permeated?
must we not have permeated?
must you not have permeated?
must they not have permeated? 	must I not have been permeating?
must you not have been permeating?
must she not have been permeating?
must we not have been permeating?
must you not have been permeating?
must they not have been permeating?