English verb conjugation
COULD ISOLATE

Regular verb: isolate - isolated - isolated

Affirmation

Simple form	V-ing form
I could isolate you could isolate she could isolate we could isolate you could isolate they could isolate	I could be isolating you could be isolating she could be isolating we could be isolating you could be isolating they could be isolating
Perfect	V-ing perfect
I could have isolated you could have isolated she could have isolated we could have isolated you could have isolated they could have isolated	I could have been isolating you could have been isolating she could have been isolating we could have been isolating you could have been isolating they could have been isolating

Negation

Simple form	V-ing form
I could not isolate you could not isolate she could not isolate we could not isolate you could not isolate they could not isolate	I could not be isolating you could not be isolating she could not be isolating we could not be isolating you could not be isolating they could not be isolating
Perfect	V-ing perfect
I could not have isolated you could not have isolated she could not have isolated we could not have isolated you could not have isolated they could not have isolated	I could not have been isolating you could not have been isolating she could not have been isolating we could not have been isolating you could not have been isolating they could not have been isolating

Interrogative form

Simple form	V-ing form
could I isolate? could you isolate? could she isolate? could we isolate? could you isolate? could they isolate?	could I be isolating? could you be isolating? could she be isolating? could we be isolating? could you be isolating? could they be isolating?
Perfect	V-ing perfect
could I have isolated? could you have isolated? could she have isolated? could we have isolated? could you have isolated? could they have isolated?	could I have been isolating? could you have been isolating? could she have been isolating? could we have been isolating? could you have been isolating? could they have been isolating?

Interro-negative form

Simple form	V-ing form
could I not isolate? could you not isolate? could she not isolate? could we not isolate? could you not isolate? could they not isolate?	could I not be isolating? could you not be isolating? could she not be isolating? could we not be isolating? could you not be isolating? could they not be isolating?
Perfect	V-ing perfect
could I not have isolated? could you not have isolated? could she not have isolated? could we not have isolated? could you not have isolated? could they not have isolated?	could I not have been isolating? could you not have been isolating? could she not have been isolating? could we not have been isolating? could you not have been isolating? could they not have been isolating?