English verb conjugation
COULD ISOMERIZE

Regular verb: isomerize - isomerized - isomerized

Affirmation

Simple form	V-ing form
I could isomerize you could isomerize he could isomerize we could isomerize you could isomerize they could isomerize	I could be isomerizing you could be isomerizing he could be isomerizing we could be isomerizing you could be isomerizing they could be isomerizing
Perfect	V-ing perfect
I could have isomerized you could have isomerized he 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 he 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
I couldn't isomerize you couldn't isomerize he couldn't isomerize we couldn't isomerize you couldn't isomerize they couldn't isomerize	I couldn't be isomerizing you couldn't be isomerizing he couldn't be isomerizing we couldn't be isomerizing you couldn't be isomerizing they couldn't be isomerizing
Perfect	V-ing perfect
I couldn't have isomerized you couldn't have isomerized he couldn't have isomerized we couldn't have isomerized you couldn't have isomerized they couldn't have isomerized	I couldn't have been isomerizing you couldn't have been isomerizing he couldn't have been isomerizing we couldn't have been isomerizing you couldn't have been isomerizing they couldn't have been isomerizing

Interrogative form

Simple form	V-ing form
could I isomerize? could you isomerize? could he isomerize? could we isomerize? could you isomerize? could they isomerize?	could I be isomerizing? could you be isomerizing? could he be isomerizing? could we be isomerizing? could you be isomerizing? could they be isomerizing?
Perfect	V-ing perfect
could I have isomerized? could you have isomerized? could he 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 he 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
couldn't I isomerize? couldn't you isomerize? couldn't he isomerize? couldn't we isomerize? couldn't you isomerize? couldn't they isomerize?	couldn't I be isomerizing? couldn't you be isomerizing? couldn't he be isomerizing? couldn't we be isomerizing? couldn't you be isomerizing? couldn't they be isomerizing?
Perfect	V-ing perfect
couldn't I have isomerized? couldn't you have isomerized? couldn't he have isomerized? couldn't we have isomerized? couldn't you have isomerized? couldn't they have isomerized?	couldn't I have been isomerizing? couldn't you have been isomerizing? couldn't he have been isomerizing? couldn't we have been isomerizing? couldn't you have been isomerizing? couldn't they have been isomerizing?