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 could not subsist
you could not subsist
she could not subsist
we could not subsist
you could not subsist
they could not subsist 	I could not be subsisting
you could not be subsisting
she could not be subsisting
we could not be subsisting
you could not be subsisting
they could not be subsisting	I could not have subsisted
you could not have subsisted
she could not have subsisted
we could not have subsisted
you could not have subsisted
they could not have subsisted	I could not have been subsisting
you could not have been subsisting
she could not have been subsisting
we could not have been subsisting
you could not have been subsisting
they could not 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 	
could I not subsist?
could you not subsist?
could she not subsist?
could we not subsist?
could you not subsist?
could they not subsist? 	could I not be subsisting?
could you not be subsisting?
could she not be subsisting?
could we not be subsisting?
could you not be subsisting?
could they not be subsisting? 	could I not have subsisted?
could you not have subsisted?
could she not have subsisted?
could we not have subsisted?
could you not have subsisted?
could they not have subsisted? 	could I not have been subsisting?
could you not have been subsisting?
could she not have been subsisting?
could we not have been subsisting?
could you not have been subsisting?
could they not have been subsisting?