could permeate
Regular verb: permeate - permeated- permeated

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't permeate
you couldn't permeate
she couldn't permeate
we couldn't permeate
you couldn't permeate
they couldn't permeate 	I couldn't be permeating
you couldn't be permeating
she couldn't be permeating
we couldn't be permeating
you couldn't be permeating
they couldn't be permeating	I couldn't have permeated
you couldn't have permeated
she couldn't have permeated
we couldn't have permeated
you couldn't have permeated
they couldn't have permeated	I couldn't have been permeating
you couldn't have been permeating
she couldn't have been permeating
we couldn't have been permeating
you couldn't have been permeating
they couldn't have been permeating	

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

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