English verb conjugation
COULD INSULATE

Regular verb: insulate - insulated - insulated

Affirmation

Simple form	V-ing form
I could insulate you could insulate she could insulate we could insulate you could insulate they could insulate	I could be insulating you could be insulating she could be insulating we could be insulating you could be insulating they could be insulating
Perfect	V-ing perfect
I could have insulated you could have insulated she could have insulated we could have insulated you could have insulated they could have insulated	I could have been insulating you could have been insulating she could have been insulating we could have been insulating you could have been insulating they could have been insulating

Negation

Simple form	V-ing form
I could not insulate you could not insulate she could not insulate we could not insulate you could not insulate they could not insulate	I could not be insulating you could not be insulating she could not be insulating we could not be insulating you could not be insulating they could not be insulating
Perfect	V-ing perfect
I could not have insulated you could not have insulated she could not have insulated we could not have insulated you could not have insulated they could not have insulated	I could not have been insulating you could not have been insulating she could not have been insulating we could not have been insulating you could not have been insulating they could not have been insulating

Interrogative form

Simple form	V-ing form
could I insulate? could you insulate? could she insulate? could we insulate? could you insulate? could they insulate?	could I be insulating? could you be insulating? could she be insulating? could we be insulating? could you be insulating? could they be insulating?
Perfect	V-ing perfect
could I have insulated? could you have insulated? could she have insulated? could we have insulated? could you have insulated? could they have insulated?	could I have been insulating? could you have been insulating? could she have been insulating? could we have been insulating? could you have been insulating? could they have been insulating?

Interro-negative form

Simple form	V-ing form
could I not insulate? could you not insulate? could she not insulate? could we not insulate? could you not insulate? could they not insulate?	could I not be insulating? could you not be insulating? could she not be insulating? could we not be insulating? could you not be insulating? could they not be insulating?
Perfect	V-ing perfect
could I not have insulated? could you not have insulated? could she not have insulated? could we not have insulated? could you not have insulated? could they not have insulated?	could I not have been insulating? could you not have been insulating? could she not have been insulating? could we not have been insulating? could you not have been insulating? could they not have been insulating?