could isomerize
Regular verb: isomerize - isomerized- isomerized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could isomerize
you could isomerize
she could isomerize
we could isomerize
you could isomerize
they could isomerize 	I could be isomerizing
you could be isomerizing
she could be isomerizing
we could be isomerizing
you could be isomerizing
they could be isomerizing	I could have isomerized
you could have isomerized
she could have isomerized
we could have isomerized
you could have isomerized
they could have isomerized	I could have been isomerizing
you could have been isomerizing
she could have been isomerizing
we could have been isomerizing
you could have been isomerizing
they could have been isomerizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not isomerize
you could not isomerize
she could not isomerize
we could not isomerize
you could not isomerize
they could not isomerize 	I could not be isomerizing
you could not be isomerizing
she could not be isomerizing
we could not be isomerizing
you could not be isomerizing
they could not be isomerizing	I could not have isomerized
you could not have isomerized
she could not have isomerized
we could not have isomerized
you could not have isomerized
they could not have isomerized	I could not have been isomerizing
you could not have been isomerizing
she could not have been isomerizing
we could not have been isomerizing
you could not have been isomerizing
they could not have been isomerizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I isomerize?
could you isomerize?
could she isomerize?
could we isomerize?
could you isomerize?
could they isomerize? 	could I be isomerizing?
could you be isomerizing?
could she be isomerizing?
could we be isomerizing?
could you be isomerizing?
could they be isomerizing? 	could I have isomerized?
could you have isomerized?
could she have isomerized?
could we have isomerized?
could you have isomerized?
could they have isomerized? 	could I have been isomerizing?
could you have been isomerizing?
could she have been isomerizing?
could we have been isomerizing?
could you have been isomerizing?
could they have been isomerizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not isomerize?
could you not isomerize?
could she not isomerize?
could we not isomerize?
could you not isomerize?
could they not isomerize? 	could I not be isomerizing?
could you not be isomerizing?
could she not be isomerizing?
could we not be isomerizing?
could you not be isomerizing?
could they not be isomerizing? 	could I not have isomerized?
could you not have isomerized?
could she not have isomerized?
could we not have isomerized?
could you not have isomerized?
could they not have isomerized? 	could I not have been isomerizing?
could you not have been isomerizing?
could she not have been isomerizing?
could we not have been isomerizing?
could you not have been isomerizing?
could they not have been isomerizing?