could subsist
Regular verb: subsist - subsisted- subsisted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could subsist
you could subsist
she could subsist
we could subsist
you could subsist
they could subsist 	I could be subsisting
you could be subsisting
she could be subsisting
we could be subsisting
you could be subsisting
they could be subsisting	I could have subsisted
you could have subsisted
she could have subsisted
we could have subsisted
you could have subsisted
they could have subsisted	I could have been subsisting
you could have been subsisting
she could have been subsisting
we could have been subsisting
you could have been subsisting
they could have been subsisting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't subsist
you couldn't subsist
she couldn't subsist
we couldn't subsist
you couldn't subsist
they couldn't subsist 	I couldn't be subsisting
you couldn't be subsisting
she couldn't be subsisting
we couldn't be subsisting
you couldn't be subsisting
they couldn't be subsisting	I couldn't have subsisted
you couldn't have subsisted
she couldn't have subsisted
we couldn't have subsisted
you couldn't have subsisted
they couldn't have subsisted	I couldn't have been subsisting
you couldn't have been subsisting
she couldn't have been subsisting
we couldn't have been subsisting
you couldn't have been subsisting
they couldn't have been subsisting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I subsist?
could you subsist?
could she subsist?
could we subsist?
could you subsist?
could they subsist? 	could I be subsisting?
could you be subsisting?
could she be subsisting?
could we be subsisting?
could you be subsisting?
could they be subsisting? 	could I have subsisted?
could you have subsisted?
could she have subsisted?
could we have subsisted?
could you have subsisted?
could they have subsisted? 	could I have been subsisting?
could you have been subsisting?
could she have been subsisting?
could we have been subsisting?
could you have been subsisting?
could they have been subsisting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I subsist?
couldn't you subsist?
couldn't she subsist?
couldn't we subsist?
couldn't you subsist?
couldn't they subsist? 	couldn't I be subsisting?
couldn't you be subsisting?
couldn't she be subsisting?
couldn't we be subsisting?
couldn't you be subsisting?
couldn't they be subsisting? 	couldn't I have subsisted?
couldn't you have subsisted?
couldn't she have subsisted?
couldn't we have subsisted?
couldn't you have subsisted?
couldn't they have subsisted? 	couldn't I have been subsisting?
couldn't you have been subsisting?
couldn't she have been subsisting?
couldn't we have been subsisting?
couldn't you have been subsisting?
couldn't they have been subsisting?