could exfoliate
Regular verb: exfoliate - exfoliated- exfoliated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could exfoliate
you could exfoliate
she could exfoliate
we could exfoliate
you could exfoliate
they could exfoliate 	I could be exfoliating
you could be exfoliating
she could be exfoliating
we could be exfoliating
you could be exfoliating
they could be exfoliating	I could have exfoliated
you could have exfoliated
she could have exfoliated
we could have exfoliated
you could have exfoliated
they could have exfoliated	I could have been exfoliating
you could have been exfoliating
she could have been exfoliating
we could have been exfoliating
you could have been exfoliating
they could have been exfoliating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't exfoliate
you couldn't exfoliate
she couldn't exfoliate
we couldn't exfoliate
you couldn't exfoliate
they couldn't exfoliate 	I couldn't be exfoliating
you couldn't be exfoliating
she couldn't be exfoliating
we couldn't be exfoliating
you couldn't be exfoliating
they couldn't be exfoliating	I couldn't have exfoliated
you couldn't have exfoliated
she couldn't have exfoliated
we couldn't have exfoliated
you couldn't have exfoliated
they couldn't have exfoliated	I couldn't have been exfoliating
you couldn't have been exfoliating
she couldn't have been exfoliating
we couldn't have been exfoliating
you couldn't have been exfoliating
they couldn't have been exfoliating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I exfoliate?
could you exfoliate?
could she exfoliate?
could we exfoliate?
could you exfoliate?
could they exfoliate? 	could I be exfoliating?
could you be exfoliating?
could she be exfoliating?
could we be exfoliating?
could you be exfoliating?
could they be exfoliating? 	could I have exfoliated?
could you have exfoliated?
could she have exfoliated?
could we have exfoliated?
could you have exfoliated?
could they have exfoliated? 	could I have been exfoliating?
could you have been exfoliating?
could she have been exfoliating?
could we have been exfoliating?
could you have been exfoliating?
could they have been exfoliating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I exfoliate?
couldn't you exfoliate?
couldn't she exfoliate?
couldn't we exfoliate?
couldn't you exfoliate?
couldn't they exfoliate? 	couldn't I be exfoliating?
couldn't you be exfoliating?
couldn't she be exfoliating?
couldn't we be exfoliating?
couldn't you be exfoliating?
couldn't they be exfoliating? 	couldn't I have exfoliated?
couldn't you have exfoliated?
couldn't she have exfoliated?
couldn't we have exfoliated?
couldn't you have exfoliated?
couldn't they have exfoliated? 	couldn't I have been exfoliating?
couldn't you have been exfoliating?
couldn't she have been exfoliating?
couldn't we have been exfoliating?
couldn't you have been exfoliating?
couldn't they have been exfoliating?